nhaliday + study   1356

Prisoner's dilemma - Wikipedia
caveat to result below:
An extension of the IPD is an evolutionary stochastic IPD, in which the relative abundance of particular strategies is allowed to change, with more successful strategies relatively increasing. This process may be accomplished by having less successful players imitate the more successful strategies, or by eliminating less successful players from the game, while multiplying the more successful ones. It has been shown that unfair ZD strategies are not evolutionarily stable. The key intuition is that an evolutionarily stable strategy must not only be able to invade another population (which extortionary ZD strategies can do) but must also perform well against other players of the same type (which extortionary ZD players do poorly, because they reduce each other's surplus).[14]

Theory and simulations confirm that beyond a critical population size, ZD extortion loses out in evolutionary competition against more cooperative strategies, and as a result, the average payoff in the population increases when the population is bigger. In addition, there are some cases in which extortioners may even catalyze cooperation by helping to break out of a face-off between uniform defectors and win–stay, lose–switch agents.[8]

Iterated Prisoner's Dilemma is an Ultimatum Game: http://infoproc.blogspot.com/2012/07/iterated-prisoners-dilemma-is-ultimatum.html
The history of IPD shows that bounded cognition prevented the dominant strategies from being discovered for over over 60 years, despite significant attention from game theorists, computer scientists, economists, evolutionary biologists, etc. Press and Dyson have shown that IPD is effectively an ultimatum game, which is very different from the Tit for Tat stories told by generations of people who worked on IPD (Axelrod, Dawkins, etc., etc.).


For evolutionary biologists: Dyson clearly thinks this result has implications for multilevel (group vs individual selection):
... Cooperation loses and defection wins. The ZD strategies confirm this conclusion and make it sharper. ... The system evolved to give cooperative tribes an advantage over non-cooperative tribes, using punishment to give cooperation an evolutionary advantage within the tribe. This double selection of tribes and individuals goes way beyond the Prisoners' Dilemma model.

implications for fractionalized Europe vis-a-vis unified China?

and more broadly does this just imply we're doomed in the long run RE: cooperation, morality, the "good society", so on...? war and group-selection is the only way to get a non-crab bucket civilization?

Iterated Prisoner’s Dilemma contains strategies that dominate any evolutionary opponent:


analogy for ultimatum game: the state gives the demos a bargain take-it-or-leave-it, and...if the demos refuses...violence?
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7 days ago by nhaliday
Altruism in a volatile world | Nature
The evolution of altruism—costly self-sacrifice in the service of others—has puzzled biologists1 since The Origin of Species. For half a century, attempts to understand altruism have developed around the concept that altruists may help relatives to have extra offspring in order to spread shared genes2. This theory—known as inclusive fitness—is founded on a simple inequality termed Hamilton’s rule2. However, explanations of altruism have typically not considered the stochasticity of natural environments, which will not necessarily favour genotypes that produce the greatest average reproductive success3,4. Moreover, empirical data across many taxa reveal associations between altruism and environmental stochasticity5,6,7,8, a pattern not predicted by standard interpretations of Hamilton’s rule. Here we derive Hamilton’s rule with explicit stochasticity, leading to new predictions about the evolution of altruism. We show that altruists can increase the long-term success of their genotype by reducing the temporal variability in the number of offspring produced by their relatives. Consequently, costly altruism can evolve even if it has a net negative effect on the average reproductive success of related recipients. The selective pressure on volatility-suppressing altruism is proportional to the coefficient of variation in population fitness, and is therefore diminished by its own success. Our results formalize the hitherto elusive link between bet-hedging and altruism4,9,10,11, and reveal missing fitness effects in the evolution of animal societies.
study  bio  evolution  altruism  kinship  stylized-facts  models  intricacy  random  signal-noise  time  order-disorder  org:nat  EGT  cooperate-defect  population-genetics  moments  expectancy  multiplicative  additive 
11 days ago by nhaliday
In mainstream social and economic theory, a human being is understood as a mechanistic automaton driven by individual self-interest and governed by impersonal laws of nature and rules of behaviorism. Human automata are subject to conditioning on the basis of individual self-interest, which is a function of the individual’s pleasure and happiness, freedom from want, pain, and sadness, and standards of biological fitness including survival and reproduction, all of which inhabit a standardized economy with a monetary metric. Man is thus simplistically viewed as an economic agent subject to monetary control, through centralization of which the entire future of mankind can in principle be mechanistically determined by the calculated pushing of buttons. Obviously, this dualistic view of man represents a complete negation of human dignity and sovereignty, reducing the human race to cattle. It is also incompatible with any kind of religion other than that referred to by Marx as an “opiate of the masses”.


Dualism has precipitated a dualistic and therefore dissociative crisis of human identity which, by impeding the spiritual level of human self-identification, amounts to a crisis of spirituality. This crisis has metastasized into the socio-political and economic realms, where philosophical dualism has been cynically and sometimes catastrophically exploited. Even as people are assured that their interests are of primary importance by government, corporate, and institutional leaders, they are more often viewed and treated as common and therefore disposable stimulus-response machines, of no greater value than other readily available forms of matter.

Societies are cybernetic; they are control-and-communication feedback loops in which top-down control tends to increase over time. Absent religious opposition, governments increasingly behave like malevolent egregores, using secrecy, disinformation, indoctrination, coercion, and conditioning to control their citizens. Even religion itself may be used to such ends; for example, ecumenical and interfaith conferences and councils nominally dedicated to a millennial religious reformation or synthesis may be controlled by those preferring to shape human identity rather than comprehend it … to “remodel” man at their administrative or personal convenience. Secular control, facilitated by mutual suppression of divergent ideologies, masquerades as religious unification in the absence of coherent scientific, philosophical, or theological opposition.


On one side is the Human Singularity, a mass realization of the expansive spiritual identity of the human species. Basically, this is the mass spiritual awakening that we have been led to expect by, e.g., certain currents in “New Age” thought. The prototype for this kind of singularity is the Omega Point of Pierre Teilhard de Chardin, representing an evolutionary terminus and divine spiritual unification event through which mankind, and reality itself, will achieve “Christ-Consciousness” and be forever transformed. (After its introduction by Teilhard, the concept was developed by various authors, ironically including a few science-oriented, ostensibly tech-minded authors like Frank Tipler and David Deutsch.)

On the other side is the Tech Singularity, seminally formulated by the celebrated mathematician John von Neumann as the approaching juncture at which "technological progress will become incomprehensively rapid and complicated”, prior to which “the ever-accelerating progress of technology ... gives the appearance of approaching some essential singularity [italicized for emphasis] in the history of the race beyond which human affairs, as we know them, could not continue" (Ulam, 1958). In short, von Neumann foresaw an uncontrollable technological quickening, a sudden acceleration of complexity followed by the transformation (or extinction) of humanity.

Most discussions of the Tech Singularity have been naive to the point of disingenuity, boiling down to starry-eyed encomiums to the power of human intelligence to inventively couple with reality on the physical level of being using technological marvels both real and imagined, including implants, prosthetics, genetic engineering, virtual realities, and above all, a merging of human intelligence with AI. The problem with such discussions is that they seem to inhabit a socioeconomic and political vacuum, whereas in fact, the singularity concept is fraught with worrisome complications involving economic and sociopolitical factors apart from which it cannot be properly evaluated.

The Human and Tech Singularities relate to each other by a kind of duality; the former is extended and spacelike, representing the even distribution of spiritual and intellectual resources over the whole of mankind, while the latter is a compact, pointlike concentration of all resources in the hands of just those who can afford full access to the best and most advanced technology. Being opposed to each other with respect to the distribution of the resources of social evolution, they are also opposed with respect to the structure of society; symmetric distribution of the capacity for effective governance corresponds to a social order based on individual freedom and responsibility, while extreme concentration of the means of governance leads to a centralized, hive-like system at the center of which resides an oligarchic concentration of wealth and power, with increasing scarcity elsewhere due to the addictive, self-reinforcing nature of privilege. (Note that this differs from the usual understanding of individualism, which is ordinarily associated with capitalism and juxtaposed with collectivism; in fact, both capitalism and collectivism, as they are monopolistically practiced on the national and global scales, lead to oligarchy and a loss of individuality for the vast majority of people. A Human Singularity is something else entirely, empowering individuals rather than facilitating their disempowerment.)

The existence of two possible singularities presupposes a point of bifurcation or divergence beyond which the evolutionary momentum of mankind must carry it. Presently, all of the momentum belongs to the Tech Singularity; it is preferred by the financial, corporate, and governmental interests which drive the general economy. This momentum is reinforced by the seeming unavailability of alternatives, i.e., the nonexistence of any other track onto which society might be steered in order to escape an oligarchical AI lockdown. It is one thing for humankind to awaken en masse to its impending enslavement through a seemingly inevitable Tech Singularity; it is quite another to have a superior alternative clearly in view.

In order to reach any alternate destination whatsoever, humanity must understand what has been driving it toward the Tech Singularity. At this point, the reason is clear: the virtually automatic concentration of wealth and power, which has been observed to occur under both capitalism and socialism, fractionates humanity into an overclass and an underclass between which all else is crushed out of existence as though by the jaws of a vise. That is, the top and bottom levels of society become the jaws of a vise which, due to the screwing down of the upper jaw against the anvil-like lower jaw, crushes the middle class and all meaningful competition out of existence, thus normalizing the hive through the economic, physical, and psychological standardization of its drones and workers.

For reasons that should by now be evident, let us call this process a “parasitic divergence” – i.e., an organized divergence of humanity into a parasitic overclass and a relatively impoverished underclass serving as its mind-controlled host, mirroring the gruesome effects of certain obligate parasites on the organisms they attack - and acknowledge that it is driven by the self-reinforcing and therefore accelerating acquisition of wealth, power, and technological control by the rich. Left to run away with itself, this process ultimately leads to a "singular" concentration of wealth and power ... a kind of sociopolitical-economic "black hole" that never stops gravitating. As the top jaw of the vise grows smaller, denser, and stronger, the bottom jaw grows larger and weaker; and as human utility becomes increasingly concentrated, every significant increase in the wealth of the overclass translates into a greater amount of misery for the underclass, arbitrarily diminishing the net utility of mankind.
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12 days ago by nhaliday
Overcoming Bias : The Model to Beat: Status Rank
People often presume that policy can mostly ignore income inequality if key individual outcomes like health or happiness depend mainly on individual income. Yes, there’s some room for promoting insurance against income risk, but not much room. However, people often presume that policy should pay a lot more attention to inequality if individual outcomes depend more directly on the income of others, such as via envy or discouragement.

However, there’s a simple and plausible income interdependence scenario where inequality matters little for policy: when outcomes depend on rank. If individual outcomes are a function of each person’s percentile income rank, and if social welfare just adds up those individual outcomes, then income policy becomes irrelevant, because this social welfare sum is guaranteed to always add up to the same constant. Income-related policy may influence outcomes via other channels, but not via this channel. This applies whether the relevant rank is global, comparing each person to the entire world, or local, comparing each person only to a local community.

That 2010 paper, by Christopher Boyce, Gordon Brown, and Simon Moore, makes a strong case that in fact the outcome of life satisfaction depends on the incomes of others only via income rank. (Two followup papers find the same result for outcomes of psychological distress and nine measures of health.) They looked at 87,000 Brits, and found that while income rank strongly predicted outcomes, neither individual (log) income nor an average (log) income of their reference group predicted outcomes, after controlling for rank (and also for age, gender, education, marital status, children, housing ownership, labor-force status, and disabilities). These seem to me remarkably strong and robust results. (Confirmed here.)
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19 days ago by nhaliday
China’s Ideological Spectrum
We find that public preferences are weakly constrained, and the configuration of preferences is multidimensional, but the latent traits of these dimensions are highly correlated. Those who prefer authoritarian rule are more likely to support nationalism, state intervention in the economy, and traditional social values; those who prefer democratic institutions and values are more likely to support market reforms but less likely to be nationalistic and less likely to support traditional social values. This latter set of preferences appears more in provinces with higher levels of development and among wealthier and better-educated respondents.
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20 days ago by nhaliday
Religiosity and Fertility in the United States: The Role of Fertility Intentions
Using data from the 2002 National Survey of Family Growth (NSFG), we show that women who report that religion is “very important” in their everyday life have both higher fertility and higher intended fertility than those saying religion is “somewhat important” or “not important.” Factors such as unwanted fertility, age at childbearing, or degree of fertility postponement seem not to contribute to religiosity differentials in fertility. This answer prompts more fundamental questions: what is the nature of this greater “religiosity”? And why do the more religious want more children? We show that those saying religion is more important have more traditional gender and family attitudes and that these attitudinal differences account for a substantial part of the fertility differential. We speculate regarding other contributing causes.
study  sociology  religion  theos  usa  correlation  fertility  eric-kaufmann  causation  general-survey  demographics  phalanges  intervention  gender  tradition  social-norms  parenting  values  politics  ideology 
27 days ago by nhaliday
Randomizing Religion: The Impact of Protestant Evangelism on Economic Outcomes
To test the causal impact of religiosity, we conducted a randomized evaluation of an evangelical Protestant Christian values and theology education program that consisted of 15 weekly half-hour sessions. We analyze outcomes for 6,276 ultra-poor Filipino households six months after the program ended. We find _significant increases in religiosity and income_, no significant changes in total labor supply, assets, consumption, food security, or life satisfaction, and a significant decrease in perceived relative economic status. Exploratory analysis suggests the program may have improved hygienic practices and increased household discord, and that _the income treatment effect may operate through increasing grit_.
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27 days ago by nhaliday
Effects of Education on Political Opinions: An International Study | International Journal of Public Opinion Research | Oxford Academic
Education and Political Party: The Effects of College or Social Class?: https://www.jstor.org/stable/2778029
The impact of education on political ideology: Evidence from European compulsory education reforms: https://www.sciencedirect.com/science/article/pii/S0272775716301704
correlation is with leftism, causal effect is shift to right

Greg thinks there are some effects: https://pinboard.in/u:nhaliday/b:5adca8f16265



Bryan Caplan has written a very persuasive book suggesting that retention/transfer of learning is very low. how do we know it’s not the same with the “PoMo ethos”
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5 weeks ago by nhaliday
Why has the prevalence of obesity doubled? | SpringerLink
The prevalence of obesity has doubled over the last 25 years. We estimate the effects of multiple socio-environmental factors (e.g., physical demands at work, restaurants, food prices, cigarette smoking, food stamps, and urban sprawl) on obesity using NLSY data. Then we use the Oaxaca–Blinder decomposition technique to approximate the contribution of each socio-environmental factor to the increase during this time. Many socio-environmental factors significantly affect weight, but none are able to explain a large portion of the obesity increase. Decreases in cigarette smoking consistently explains about 2–4 % of the increase in obesity and BMI. Food stamp receipt also consistently affects the measures of weight, but the small decrease in food stamp program participation during the period we examine actually dampened the increases in obesity and BMI. Collectively, the socio-environmental factors we examine never explain more than about 6.5 % of the weight increases.
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6 weeks ago by nhaliday
Sex, Drugs, and Bitcoin: How Much Illegal Activity Is Financed Through Cryptocurrencies? by Sean Foley, Jonathan R. Karlsen, Tālis J. Putniņš :: SSRN
Cryptocurrencies are among the largest unregulated markets in the world. We find that approximately one-quarter of bitcoin users and one-half of bitcoin transactions are associated with illegal activity. Around $72 billion of illegal activity per year involves bitcoin, which is close to the scale of the US and European markets for illegal drugs. The illegal share of bitcoin activity declines with mainstream interest in bitcoin and with the emergence of more opaque cryptocurrencies. The techniques developed in this paper have applications in cryptocurrency surveillance. Our findings suggest that cryptocurrencies are transforming the way black markets operate by enabling “black e-commerce.”
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6 weeks ago by nhaliday
Language Complexity and Community Size | Proceedings of the Royal Society of London B: Biological Sciences
Our simulations thus suggest that language, and possibly other aspects of culture, may become simpler at the structural level as our world becomes increasingly interconnected.
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7 weeks ago by nhaliday
Why Sex? And why only in Pairs? - Marginal REVOLUTION
The core conclusion is that mutations continue to rise with the number of sex-participating partners, but in simple Red Queen models the limiting features of the genotypes is the same whether there are two, three, or more partners.
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7 weeks ago by nhaliday
Anisogamy - Wikipedia
Anisogamy is a fundamental concept of sexual dimorphism that helps explain phenotypic differences between sexes.[3] In most species a male and female sex exist, both of which are optimized for reproductive potential. Due to their differently sized and shaped gametes, both males and females have developed physiological and behavioral differences that optimize the individual’s fecundity.[3] Since most egg laying females typically must bear the offspring and have a more limited reproductive cycle, this typically makes females a limiting factor in the reproductive success rate of males in a species. This process is also true for females selecting males, and assuming that males and females are selecting for different traits in partners, would result in phenotypic differences between the sexes over many generations. This hypothesis, known as the Bateman’s Principle, is used to understand the evolutionary pressures put on males and females due to anisogamy.[4] Although this assumption has criticism, it is a generally accepted model for sexual selection within anisogamous species. The selection for different traits depending on sex within the same species is known as sex-specific selection, and accounts for the differing phenotypes found between the sexes of the same species. This sex-specific selection between sexes over time also lead to the development of secondary sex characteristics, which assist males and females in reproductive success.


Since this process is very energy-demanding and time consuming for the female, mate choice is often integrated into the female’s behavior.[3] Females will often be very selective of the males they choose to reproduce with, for the phenotype of the male can be indicative of the male’s physical health and heritable traits. Females employ mate choice to pressure males into displaying their desirable traits to females through courtship, and if successful, the male gets to reproduce. This encourages males and females of specific species to invest in courtship behaviors as well as traits that can display physical health to a potential mate. This process, known as sexual selection,[3] results in the development of traits to ease reproductive success rather than individual survival, such as the inflated size of a termite queen. It is also important for females to select against potential mates that may have a sexually transmitted infection, for the disease could not only hurt the female’s reproductive ability, but also damage the resulting offspring.[7]

Although not uncommon in males, females are more associated with parental care.[8] Since females are on a more limited reproductive schedule than males, a female often invests more in protecting the offspring to sexual maturity than the male. Like mate choice, the level of parental care varies greatly between species, and is often dependent on the number of offspring produced per sexual encounter.[8]


Since females are often the limiting factor in a species reproductive success, males are often expected by the females to search and compete for the female, known as intraspecific competition.[4] This can be seen in organisms such as bean beetles, as the male that searches for females more frequently is often more successful at finding mates and reproducing. In species undergoing this form of selection, a fit male would be one that is fast, has more refined sensory organs, and spatial awareness.[4]

Darwinian sex roles confirmed across the animal kingdom: http://advances.sciencemag.org/content/2/2/e1500983.full
Since Darwin’s conception of sexual selection theory, scientists have struggled to identify the evolutionary forces underlying the pervasive differences between male and female behavior, morphology, and physiology. The Darwin-Bateman paradigm predicts that anisogamy imposes stronger sexual selection on males, which, in turn, drives the evolution of conventional sex roles in terms of female-biased parental care and male-biased sexual dimorphism. Although this paradigm forms the cornerstone of modern sexual selection theory, it still remains untested across the animal tree of life. This lack of evidence has promoted the rise of alternative hypotheses arguing that sex differences are entirely driven by environmental factors or chance. We demonstrate that, across the animal kingdom, sexual selection, as captured by standard Bateman metrics, is indeed stronger in males than in females and that it is evolutionarily tied to sex biases in parental care and sexual dimorphism. Our findings provide the first comprehensive evidence that Darwin’s concept of conventional sex roles is accurate and refute recent criticism of sexual selection theory.

Coevolution of parental investment and sexually selected traits drives sex-role divergence: https://www.nature.com/articles/ncomms12517
Sex-role evolution theory attempts to explain the origin and direction of male–female differences. A fundamental question is why anisogamy, the difference in gamete size that defines the sexes, has repeatedly led to large differences in subsequent parental care. Here we construct models to confirm predictions that individuals benefit less from caring when they face stronger sexual selection and/or lower certainty of parentage. However, we overturn the widely cited claim that a negative feedback between the operational sex ratio and the opportunity cost of care selects for egalitarian sex roles. We further argue that our model does not predict any effect of the adult sex ratio (ASR) that is independent of the source of ASR variation. Finally, to increase realism and unify earlier models, we allow for coevolution between parental investment and investment in sexually selected traits. Our model confirms that small initial differences in parental investment tend to increase due to positive evolutionary feedback, formally supporting long-standing, but unsubstantiated, verbal arguments.

Parental investment, sexual selection and sex ratios: http://www.kokkonuts.org/wp-content/uploads/Parental_investment_review.pdf
The second argument takes the reasonable premise that anisogamy produces a male-biased operational sex ratio (OSR) leading to males competing for mates. Male care is then predicted to be less likely to evolve as it consumes resources that could otherwise be used to increase competitiveness. However, given each offspring has precisely two genetic parents (the Fisher condition), a biased OSR generates frequency-dependent selection, analogous to Fisherian sex ratio selection, that favours increased parental investment by whichever sex faces more intense competition. Sex role divergence is therefore still an evolutionary conundrum. Here we review some possible solutions. Factors that promote conventional sex roles are sexual selection on males (but non-random variance in male mating success must be high to override the Fisher condition), loss of paternity because of female multiple mating or group spawning and patterns of mortality that generate female-biased adult sex ratios (ASR). We present an integrative model that shows how these factors interact to generate sex roles. We emphasize the need to distinguish between the ASR and the operational sex ratio (OSR). If mortality is higher when caring than competing this diminishes the likelihood of sex role divergence because this strongly limits the mating success of the earlier deserting sex. We illustrate this in a model where a change in relative mortality rates while caring and competing generates a shift from a mammalian type breeding system (female-only care, male-biased OSR and female-biased ASR) to an avian type system (biparental care and a male-biased OSR and ASR).

LATE FEMINISM: https://jacobitemag.com/2017/08/01/late-feminism/
Woman has had a good run. For 200,000 years humankind’s anisogamous better (and bigger) half has enjoyed a position of desirability and safety befitting a scarce commodity. She has also piloted the evolutionary destiny of our species, both as a sexual selector and an agitator during man’s Promethean journey. In terms of comfort and agency, the human female is uniquely privileged within the annals of terrestrial biology.

But the era of female privilege is ending, in a steady decline that began around 1572. Woman’s biological niche is being crowded out by capital.


Strictly speaking, the breadth of the coming changes extend beyond even civilizational dynamics. They will affect things that are prior. One of the oldest and most practical definitions for a biological species defines its boundary as the largest group of organisms where two individuals, via sexual reproduction, can produce fertile offspring together. The imminent arrival of new reproductive technologies will render the sexual reproduction criteria either irrelevant or massively expanded, depending upon one’s perspective. Fertility of the offspring is similarly of limited relevance, since the modification of gametes will be de rigueur in any case. What this looming technology heralds is less a social revolution than it is a full sympatric speciation event.

Accepting the inevitability of the coming bespoke reproductive revolution, consider a few questions & probable answers regarding our external-womb-grown ubermenschen:

Q: What traits will be selected for?

A: Ability to thrive in a global market economy (i.e. ability to generate value for capital.)

Q: What material substrate will generate the new genomes?

A: Capital equipment.

Q: Who will be making the selection?

A: People, at least initially, (and who coincidentally will be making decisions that map 1-to-1 to the interests of capital.)

_Replace any of the above instances of the word capital with women, and you would have accurate answers for most of our species’ history._


In terms of pure informational content, the supernova seen from earth can be represented in a singularly compressed way: a flash of light on a black field where there previously was none. A single photon in the cone of the eye, at the limit. Whether … [more]
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7 weeks ago by nhaliday
Sacred text as cultural genome: an inheritance mechanism and method for studying cultural evolution: Religion, Brain & Behavior: Vol 7, No 3
Yasha M. Hartberg & David Sloan Wilson

Any process of evolution requires a mechanism of inheritance for the transmission of information across generations and the expression of phenotypes during each generation. Genetic inheritance mechanisms have been studied for over a century but mechanisms of inheritance for human cultural evolution are far less well understood. Sacred religious texts have the properties required for an inheritance system. They are replicated across generations with high fidelity and are transcribed into action every generation by the invocation and interpretation of selected passages. In this article we borrow concepts and methods from genetics and epigenetics to study the “expressed phenotypes” of six Christian churches that differ along a conservative–progressive axis. Their phenotypic differences, despite drawing upon the same sacred text, can be explained in part by differential expression of the sacred text. Since the invocation and interpretation of sacred texts are often well preserved, our methods allow the expressed phenotypes of religious groups to be studied at any time and place in history.
study  interdisciplinary  bio  sociology  cultural-dynamics  anthropology  religion  christianity  theos  protestant-catholic  politics  ideology  correlation  organizing  institutions  analogy  genetics  genomics  epigenetics  comparison  culture  pdf  piracy  density  flexibility  noble-lie  deep-materialism  new-religion  universalism-particularism  homo-hetero  hypocrisy  group-selection  models  coordination  info-dynamics  evolution  impact  left-wing  right-wing  time  tradition  spreading  sanctity-degradation  coalitions  trees  usa  social-capital  hari-seldon  wisdom  the-basilisk  frequency 
10 weeks ago by nhaliday
The idea of empire in the "Aeneid" on JSTOR
Let's see...Aeneid, Book VI, ll. 851-853:

tu regere imperio populos, Romane, memento
(hae tibi erunt artes), pacique imponere morem,
parcere subiectis et debellare superbos.'

Which Dryden translated as:
To rule mankind, and make the world obey,
Disposing peace and war by thy own majestic way;
To tame the proud, the fetter'd slave to free:
These are imperial arts, and worthy thee."

If you wanted a literal translation,
"You, Roman, remember to rule people by command
(these were arts to you), and impose the custom to peace,
to spare the subjected and to vanquish the proud."

I don't want to derail your thread but pacique imponere morem -- "to impose the custom to peace"
Does it mean "be the toughest kid on the block," as in Pax Romana?


That 17th century one is a loose translation indeed. Myself I'd put it as

"Remember to rule over (all) the (world's) races by means of your sovereignty, oh Roman, (for indeed) you (alone) shall have the means (to do so), and to inculcate the habit of peace, and to have mercy on the enslaved and to destroy the arrogant."

And thou, great hero, greatest of thy name,
Ordain'd in war to save the sinking state,
And, by delays, to put a stop to fate!
Let others better mold the running mass
Of metals, and inform the breathing brass,
And soften into flesh a marble face;
Plead better at the bar; describe the skies,
And when the stars descend, and when they rise.
But, Rome, 't is thine alone, with awful sway,
To rule mankind, and make the world obey,
Disposing peace and war by thy own majestic way;
To tame the proud, the fetter'd slave to free:
These are imperial arts, and worthy thee."
study  article  letters  essay  pdf  piracy  history  iron-age  mediterranean  the-classics  big-peeps  literature  aphorism  quotes  classic  alien-character  sulla  poetry  conquest-empire  civilization  martial  vitality  peace-violence  order-disorder  domestication  courage  multi  poast  universalism-particularism  world  leviathan  foreign-lang  nascent-state  canon  org:junk  org:edu  tradeoffs  checklists  power  strategy  tactics  paradox  analytical-holistic  hari-seldon  aristos  wisdom 
10 weeks ago by nhaliday
What explains the formation and decay of clusters of creativity? - Marginal REVOLUTION
Creativity is often highly concentrated in time and space, and across different domains. What explains the formation and decay of clusters of creativity? In this paper we match data on thousands of notable individuals born in Europe between the XIth and the XIXth century with historical data on city institutions and population. After documenting several stylized facts, we show that the formation of creative clusters is not preceded by increases in city size. Instead, the emergence of city institutions protecting economic and political freedoms facilitates the attraction and production of creative talent.

IOW, the opposite of what Dick Florida said.
econotariat  marginal-rev  links  commentary  study  economics  growth-econ  broad-econ  cliometrics  innovation  stylized-facts  contrarianism  urban-rural  europe  the-great-west-whale  history  medieval  political-econ  institutions  microfoundations  roots  policy  nascent-state  creative  civil-liberty  randy-ayndy  polisci  regulation  capitalism  markets  mokyr-allen-mccloskey  enlightenment-renaissance-restoration-reformation  reflection  track-record 
11 weeks ago by nhaliday
Comparative Litigation Rates
We suggest that the notoriety of the U.S. does not result from the way citizens and judges handle routine disputes, which (different as it may be in developing countries) is not very different from in other wealthy, democratic societies,. Instead, American notoriety results from the peculiarly dysfunctional way judges handle disputes in discrete legal areas such as class actions and punitive damages
pdf  study  law  institutions  usa  alien-character  stereotypes  leviathan  polisci  political-econ  comparison  britain  japan  asia  europe  gallic  canada  anglo  roots  intricacy  data  pro-rata 
12 weeks ago by nhaliday
The Politics of Mate Choice
TABLE 1 Spousal Concordance on 16 Traits Pearson’s r (n)

Church attendance .714 (4950)
W-P Index (28 items) .647 (3984)
Drinking frequency .599 (4984)
Political party support .596 (4547)
Education .498 (4957)
Height .227 (4964)
pdf  study  sociology  anthropology  sex  assortative-mating  correlation  things  phalanges  planning  long-term  human-bean  religion  theos  politics  polisci  ideology  ethanol  time-use  coalitions  education  embodied  integrity  sleep  rhythm  personality  psych-architecture  stress  psychiatry  self-report  extra-introversion  discipline  self-control  patience  data  database  list  top-n  objektbuch  values  habit  time  density  twin-study  longitudinal  tradition  time-preference  life-history  selection  psychology  social-psych  flux-stasis  demographics  frequency 
december 2017 by nhaliday
Deliberate Practice and Performance in Music, Games, Sports, Education, and Professions: A Meta-Analysis
We found that deliberate practice explained 26% of the variance in performance for games, 21% for music, 18% for sports, 4% for education, and less than 1% for professions. We conclude that deliberate practice is important, but not as important as has been argued.
pdf  study  psychology  cog-psych  social-psych  teaching  tutoring  learning  studying  stylized-facts  metabuch  career  long-term  music  games  sports  education  labor  data  list  expert-experience  ability-competence  roots  variance-components  top-n  meta-analysis  practice 
december 2017 by nhaliday
The rate of return on everything - Marginal REVOLUTION
Here is what I learned from the paper itself:

1. Risky assets such as equities and residential real estate average about 7% gains per year in real terms.  Housing outperformed equity before WWII, vice versa after WWII.  In any case it is a puzzle that housing returns are less volatile but about at the same level as equity returns over a broader time span.
2. Equity and housing gains have a relatively low covariance.  Buy both!
3. Equity returns across countries have become increasingly correlated, housing returns not.
4. The return on real safe assets is much more volatile than you might think.
5. The equity premium is volatile too.
6. The authors find support for Piketty’s r > g, except near periods of war.  Furthermore, the gap between r and g does not seem to be correlated with the growth rate of the economy.

I found this to be one of the best and most interesting papers of the year.
econotariat  marginal-rev  commentary  study  summary  economics  macro  investing  ORFE  securities  data  street-fighting  objektbuch  scale  time-preference  cost-benefit  outcome-risk  housing  money  monetary-fiscal  debt  history  mostly-modern  world-war  trends  correlation  moments  growth-econ  inequality  piketty  stylized-facts  war  meta:war 
december 2017 by nhaliday
Digital Screen Time Limits and Young Children's Psychological Well-Being: Evidence From a Population-Based Study - Przybylski - 2017 - Child Development - Wiley Online Library
Data from 19,957 telephone interviews with parents of 2- to 5-year-olds assessed their children's digital screen use and psychological well-being in terms of caregiver attachment, resilience, curiosity, and positive affect in the past month. Evidence did not support implementing limits (< 1 or < 2 hr/day) as recommended by the American Academy of Pediatrics, once variability in child ethnicity, age, gender, household income, and caregiver educational attainment were considered.
study  psychology  cog-psych  developmental  parenting  attention  the-monster  inhibition  exocortex  discipline  internet  evidence-based  null-result  observer-report  time  time-use  intervention  aversion  science-anxiety  confounding  demographics  race  compensation  money  class  education  bootstraps 
december 2017 by nhaliday
Frontiers | Can We Validate the Results of Twin Studies? A Census-Based Study on the Heritability of Educational Achievement | Genetics
As for most phenotypes, the amount of variance in educational achievement explained by SNPs is lower than the amount of additive genetic variance estimated in twin studies. Twin-based estimates may however be biased because of self-selection and differences in cognitive ability between twins and the rest of the population. Here we compare twin registry based estimates with a census-based heritability estimate, sampling from the same Dutch birth cohort population and using the same standardized measure for educational achievement. Including important covariates (i.e., sex, migration status, school denomination, SES, and group size), we analyzed 893,127 scores from primary school children from the years 2008–2014. For genetic inference, we used pedigree information to construct an additive genetic relationship matrix. Corrected for the covariates, this resulted in an estimate of 85%, which is even higher than based on twin studies using the same cohort and same measure. We therefore conclude that the genetic variance not tagged by SNPs is not an artifact of the twin method itself.
study  biodet  behavioral-gen  iq  psychometrics  psychology  cog-psych  twin-study  methodology  variance-components  state-of-art  🌞  developmental  age-generation  missing-heritability  biases  measurement  sampling-bias  sib-study 
december 2017 by nhaliday
A genetic map of the world – Gene Expression
The above map is from a new preprint on the patterns of genetic variation as a function of geography for humans, Genetic landscapes reveal how human genetic diversity aligns with geography. The authors assemble an incredibly large dataset to generate these figures. The orange zones are “troughs” of gene flow. Basically barriers to gene flow.  It is no great surprise that so many of the barriers correlate with rivers, mountains, and deserts. But the aim of this sort of work seems to be to make precise and quantitative intuitions which are normally expressed verbally.
gnxp  scitariat  commentary  bio  preprint  study  summary  genetics  genomics  pic  data  maps  visualization  stock-flow  gene-flow  walls  world  africa  europe  MENA  india  asia  china  japan  korea  anglo  developing-world  russia  sapiens  gavisti  population-genetics  geography  🌞  mediterranean  britain  oceans 
december 2017 by nhaliday
'P' Versus 'Q': Differences and Commonalities between the Two Areas of Quantitative Finance by Attilio Meucci :: SSRN
There exist two separate branches of finance that require advanced quantitative techniques: the "Q" area of derivatives pricing, whose task is to "extrapolate the present"; and the "P" area of quantitative risk and portfolio management, whose task is to "model the future."

We briefly trace the history of these two branches of quantitative finance, highlighting their different goals and challenges. Then we provide an overview of their areas of intersection: the notion of risk premium; the stochastic processes used, often under different names and assumptions in the Q and in the P world; the numerical methods utilized to simulate those processes; hedging; and statistical arbitrage.
study  essay  survey  ORFE  finance  investing  probability  measure  stochastic-processes  outcome-risk 
december 2017 by nhaliday
When to Drop a Bombshell | The Review of Economic Studies | Oxford Academic
Sender, who is either good or bad, wishes to look good at an exogenous deadline. Sender privately observes if and when she can release a public flow of information about her private type. Releasing information earlier exposes to greater scrutiny, but signals credibility. In equilibrium bad Sender releases information later than good Sender. We find empirical support for the dynamic predictions of our model using data on the timing of US presidential scandals and US initial public offerings. In the context of elections, our results suggest that October Surprises are driven by the strategic behavior of bad Sender.
study  polisci  government  institutions  democracy  media  propaganda  info-dynamics  models  GT-101  elections  tactics 
december 2017 by nhaliday
Behaving Discretely: Heuristic Thinking in the Emergency Department
I find compelling evidence of heuristic thinking in this setting: patients arriving in the emergency department just after their 40th birthday are roughly 10% more likely to be tested for and 20% more likely to be diagnosed with ischemic heart disease (IHD) than patients arriving just before this date, despite the fact that the incidence of heart disease increases smoothly with age.

Figure 1: Proportion of ED patients tested for heart attack
pdf  study  economics  behavioral-econ  field-study  biases  heuristic  error  healthcare  medicine  meta:medicine  age-generation  aging  cardio  bounded-cognition  shift  trivia  cocktail  pro-rata 
december 2017 by nhaliday
Education and Political Participation: Exploring the Causal Link | SpringerLink
To test for a causal effect of education, we exploit the rise in education levels among males induced by the Vietnam draft. We find little reliable evidence that education induced by the draft significantly increases participation rates.
study  politics  polisci  education  human-capital  correlation  confounding  endogenous-exogenous  natural-experiment  null-result  military  war  history  mostly-modern  cold-war  asia  developing-world  sociology  phalanges  stylized-facts 
december 2017 by nhaliday
Relative Quality of Foreign Nurses in the United States
We find a positive wage premium for nurses educated in the Philippines, but not for foreign nurses educated elsewhere. The premium peaked at 8% in 2000, and decreased to 4% in 2010.
pdf  study  economics  labor  industrial-org  migration  human-capital  healthcare  usa  asia  developing-world  general-survey  compensation  econ-productivity  data  ability-competence  quality 
december 2017 by nhaliday
The Long-run Effects of Agricultural Productivity on Conflict, 1400-1900∗
This paper provides evidence of the long-run effects of a permanent increase in agricultural productivity on conflict. We construct a newly digitized and geo-referenced dataset of battles in Europe, the Near East and North Africa covering the period between 1400 and 1900 CE. For variation in permanent improvements in agricultural productivity, we exploit the introduction of potatoes from the Americas to the Old World after the Columbian Exchange. We find that the introduction of potatoes permanently reduced conflict for roughly two centuries. The results are driven by a reduction in civil conflicts

#4 An obvious counterfactual is of course the potato blight (1844 and beyond) in Europe. Here’s the Wikipedia page ‘revolutions of 1848’ https://en.wikipedia.org/wiki/Revolutions_of_1848
pdf  study  marginal-rev  economics  broad-econ  cliometrics  history  medieval  early-modern  age-of-discovery  branches  innovation  discovery  agriculture  food  econ-productivity  efficiency  natural-experiment  europe  the-great-west-whale  MENA  war  revolution  peace-violence  trivia  cocktail  stylized-facts  usa  endogenous-exogenous  control  geography  cost-benefit  multi  econotariat  links  poast  wiki  reference  events  roots 
december 2017 by nhaliday
The Power of Abortion Policy - Marginal REVOLUTION
I provide new evidence on the relative “powers” of contraception and abortion policy in effecting the dramatic social transformations of the 1960s and 1970s. Trends in sexual behavior suggest that young women’s increased access to the birth control pill fueled the sexual revolution, but neither these trends nor difference-in-difference estimates support the view that this also led to substantial changes in family formation. Rather, the estimates robustly suggest that it was liberalized access to abortion that allowed large numbers of women to delay marriage and motherhood.
econotariat  marginal-rev  commentary  study  summary  economics  policy  intervention  sociology  gender  sex  fertility  demographics  demographic-transition  history  mostly-modern  cold-war  rot  roots  explanans  technology  microfoundations  nitty-gritty  sexuality  modernity  the-bones  general-survey  endogenous-exogenous  control  life-history  social-norms  medicine 
december 2017 by nhaliday
Land, history or modernization? Explaining ethnic fractionalization: Ethnic and Racial Studies: Vol 38, No 2
Ethnic fractionalization (EF) is frequently used as an explanatory tool in models of economic development, civil war and public goods provision. However, if EF is endogenous to political and economic change, its utility for further research diminishes. This turns out not to be the case. This paper provides the first comprehensive model of EF as a dependent variable.
study  polisci  sociology  political-econ  economics  broad-econ  diversity  putnam-like  race  concept  conceptual-vocab  definition  realness  eric-kaufmann  roots  database  dataset  robust  endogenous-exogenous  causation  anthropology  cultural-dynamics  tribalism  methodology  world  developing-world  🎩  things  metrics  intricacy  microfoundations 
december 2017 by nhaliday
Is the speed of light really constant?
So what if the speed of light isn’t the same when moving toward or away from us? Are there any observable consequences? Not to the limits of observation so far. We know, for example, that any one-way speed of light is independent of the motion of the light source to 2 parts in a billion. We know it has no effect on the color of the light emitted to a few parts in 1020. Aspects such as polarization and interference are also indistinguishable from standard relativity. But that’s not surprising, because you don’t need to assume isotropy for relativity to work. In the 1970s, John Winnie and others showed that all the results of relativity could be modeled with anisotropic light so long as the two-way speed was a constant. The “extra” assumption that the speed of light is a uniform constant doesn’t change the physics, but it does make the mathematics much simpler. Since Einstein’s relativity is the simpler of two equivalent models, it’s the model we use. You could argue that it’s the right one citing Occam’s razor, or you could take Newton’s position that anything untestable isn’t worth arguing over.

nibble  scitariat  org:bleg  physics  relativity  electromag  speed  invariance  absolute-relative  curiosity  philosophy  direction  gedanken  axioms  definition  models  experiment  space  science  measurement  volo-avolo  synchrony  uniqueness  multi  pdf  piracy  study  article 
november 2017 by nhaliday
Understanding differences in life expectancy inequality - Marginal REVOLUTION
The life expectancy gap at age 40 between high income and low income individuals is substantial. I explore how medical expenditures and unhealthy behaviors account for the life expectancy gap. The data reveals the following. First, low income individuals tend to spend more on healthcare than high income individuals at all ages. Moreover, health disparities by income is salient due to differences in unhealthy behaviors such as heavy smoking. To answer how much dierences in access to medical services and unhealthy behaviors can explain in light of these stylized facts, I construct a life cycle model. The distinctive features of the model are that it flexibly incorporates unobserved, potentially correlated initial human and health capital stocks and embed unhealthy behaviors. Furthermore, the model includes two health systems: private health insurance and Medicare. The main findings are i) differences in access to medical care driven by income inequality potentially accounts for 12.5% of the life expectancy gap, ii) health insurance increases longevity for low income individuals, but modestly, iii) the health condition when young shapes the trend in average medical expenditures by income groups and iv) the impact of differences in unhealthy behaviors is predominant in understanding the life expectancy gap.

Health spending negatively correlated with health outcomes: http://www.arnoldkling.com/blog/health-spending-negatively-correlated-with-health-outcomes/
Pointer from Tyler Cowen. In the paper, Katera argues that the lower life expectancy of lower-income individuals reflects differences in their behavior rather than differences in access to medical services. My thoughts:

1. This seems consistent with Hansonian medicine, in which on average the benefits of more health care spending are about zero. But it also could suggest a counter to the Hanson view. That is, it could be that at the margin everyone benefits from more health care spending, but because the people who spend more tend to be people who behave in unhealthy ways, the benefits of more spending are difficult to tease out from the data. It is like trying to measure the relationship between policing and crime. If areas with a lot of crime tend to require more police, then a simple correlation analysis might suggest that adding police does not help to reduce crime.

2. Katera’s findings are not politically correct. I am on the record as saying that academic economics is headed toward a state in which findings like this will make one almost unemployable. Imagine trying to get Katera hired in a sociology department. Katera’s experience as a job candidate will be help to indicate how far along we are on this path.
econotariat  marginal-rev  commentary  links  quotes  study  summary  economics  health  healthcare  inequality  sociology  multi  cracker-econ  prediction  social-science  westminster  censorship  academia  biases  truth  egalitarianism-hierarchy  left-wing  habit 
november 2017 by nhaliday
Estimation of effect size distribution from genome-wide association studies and implications for future discoveries
We report a set of tools to estimate the number of susceptibility loci and the distribution of their effect sizes for a trait on the basis of discoveries from existing genome-wide association studies (GWASs). We propose statistical power calculations for future GWASs using estimated distributions of effect sizes. Using reported GWAS findings for height, Crohn’s disease and breast, prostate and colorectal (BPC) cancers, we determine that each of these traits is likely to harbor additional loci within the spectrum of low-penetrance common variants. These loci, which can be identified from sufficiently powerful GWASs, together could explain at least 15–20% of the known heritability of these traits. However, for BPC cancers, which have modest familial aggregation, our analysis suggests that risk models based on common variants alone will have modest discriminatory power (63.5% area under curve), even with new discoveries.

later paper:
Distribution of allele frequencies and effect sizes and their interrelationships for common genetic susceptibility variants: http://www.pnas.org/content/108/44/18026.full

Recent discoveries of hundreds of common susceptibility SNPs from genome-wide association studies provide a unique opportunity to examine population genetic models for complex traits. In this report, we investigate distributions of various population genetic parameters and their interrelationships using estimates of allele frequencies and effect-size parameters for about 400 susceptibility SNPs across a spectrum of qualitative and quantitative traits. We calibrate our analysis by statistical power for detection of SNPs to account for overrepresentation of variants with larger effect sizes in currently known SNPs that are expected due to statistical power for discovery. Across all qualitative disease traits, minor alleles conferred “risk” more often than “protection.” Across all traits, an inverse relationship existed between “regression effects” and allele frequencies. Both of these trends were remarkably strong for type I diabetes, a trait that is most likely to be influenced by selection, but were modest for other traits such as human height or late-onset diseases such as type II diabetes and cancers. Across all traits, the estimated effect-size distribution suggested the existence of increasingly large numbers of susceptibility SNPs with decreasingly small effects. For most traits, the set of SNPs with intermediate minor allele frequencies (5–20%) contained an unusually small number of susceptibility loci and explained a relatively small fraction of heritability compared with what would be expected from the distribution of SNPs in the general population. These trends could have several implications for future studies of common and uncommon variants.


Relationship Between Allele Frequency and Effect Size. We explored the relationship between allele frequency and effect size in different scales. An inverse relationship between the squared regression coefficient and f(1 − f) was observed consistently across different traits (Fig. 3). For a number of these traits, however, the strengths of these relationships become less pronounced after adjustment for ascertainment due to study power. The strength of the trend, as captured by the slope of the fitted line (Table 2), markedly varies between traits, with an almost 10-fold change between the two extremes of distinct types of traits. After adjustment, the most pronounced trend was seen for type I diabetes and Crohn’s disease among qualitative traits and LDL level among quantitative traits. In exploring the relationship between the frequency of the risk allele and the magnitude of the associated risk coefficient (Fig. S4), we observed a quadratic pattern that indicates increasing risk coefficients as the risk-allele frequency diverges away from 0.50 either toward 0 or toward 1. Thus, it appears that regression coefficients for common susceptibility SNPs increase in magnitude monotonically with decreasing minor-allele frequency, irrespective of whether the minor allele confers risk or protection. However, for some traits, such as type I diabetes, risk alleles were predominantly minor alleles, that is, they had frequencies of less than 0.50.
pdf  nibble  study  article  org:nat  🌞  biodet  genetics  population-genetics  GWAS  QTL  distribution  disease  cancer  stat-power  bioinformatics  magnitude  embodied  prediction  scale  scaling-up  variance-components  multi  missing-heritability  effect-size  regression  correlation  data 
november 2017 by nhaliday
Use and Interpretation of LD Score Regression
LD Score regression distinguishes confounding from polygenicity in genome-wide association studies: https://sci-hub.bz/10.1038/ng.3211
- Po-Ru Loh, Nick Patterson, et al.


Both polygenicity (i.e. many small genetic effects) and confounding biases, such as cryptic relatedness and population stratification, can yield inflated distributions of test statistics in genome-wide association studies (GWAS). However, current methods cannot distinguish between inflation from bias and true signal from polygenicity. We have developed an approach that quantifies the contributions of each by examining the relationship between test statistics and linkage disequilibrium (LD). We term this approach LD Score regression. LD Score regression provides an upper bound on the contribution of confounding bias to the observed inflation in test statistics and can be used to estimate a more powerful correction factor than genomic control. We find strong evidence that polygenicity accounts for the majority of test statistic inflation in many GWAS of large sample size.

Supplementary Note: https://images.nature.com/original/nature-assets/ng/journal/v47/n3/extref/ng.3211-S1.pdf

An atlas of genetic correlations across human diseases
and traits: https://sci-hub.bz/10.1038/ng.3406


Supplementary Note: https://images.nature.com/original/nature-assets/ng/journal/v47/n11/extref/ng.3406-S1.pdf

ldsc is a command line tool for estimating heritability and genetic correlation from GWAS summary statistics. ldsc also computes LD Scores.
nibble  pdf  slides  talks  bio  biodet  genetics  genomics  GWAS  genetic-correlation  correlation  methodology  bioinformatics  concept  levers  🌞  tutorial  explanation  pop-structure  gene-drift  ideas  multi  study  org:nat  article  repo  software  tools  libraries  stats  hypothesis-testing  biases  confounding  gotchas  QTL  simulation  survey  preprint  population-genetics 
november 2017 by nhaliday
The Automated Public Sphere by Frank Pasquale :: SSRN
This article first describes the documented, negative effects of online propagandists’ interventions (and platforms’ neglect) in both electoral politics and the broader public sphere (Part I). It then proposes several legal and educational tactics to mitigate platforms’ power, or to encourage or require them to exercise it responsibly (Part II). The penultimate section (Part III) offers a concession to those suspicious of governmental intervention in the public sphere: some regimes are already too authoritarian or unreliable to be trusted with extensive powers of regulation over media (whether old or new media), or intermediaries. However, the inadvisability of extensive media regulation in disordered societies only makes this agenda more urgent in well-ordered societies, lest predictable pathologies of the automated public sphere degrade their processes of democratic will formation.
study  media  propaganda  info-dynamics  internet  automation  bots  social  facebook  google  tech  politics  polisci  law  rhetoric  regulation  madisonian 
november 2017 by nhaliday
As a foundation for this study, I organized the collection of village-level panel data on violent actors, managing teams of surveyors, village elders, and households in 380 war-torn areas of DRC. I introduce optimal taxation theory to the decision of violent actors to establish local monopolies of violence. The value of such decision hinges on their ability to tax the local population. A sharp rise in the global demand for coltan, a bulky commodity used in the electronics industry, leads violent actors to impose monopolies of violence and taxation in coltan sites, which persist even years after demand collapses. A similar rise in the demand for gold, easier to conceal and more difficult to tax, does not. However, the groups who nevertheless control gold sites are more likely to respond by undertaking investments in fiscal capacity, consistent with the difficulty to observe gold, and with well-documented trajectories of state formation in Europe (Ardant, 1975). The findings support the view that the expected revenue from taxation, determined in particular by tax base elasticity and costly investments in fiscal capacity, can explain the stages of state formation preceding the states as we recognize them today.
pdf  study  economics  growth-econ  broad-econ  political-econ  polisci  leviathan  north-weingast-like  unintended-consequences  institutions  microfoundations  econometrics  empirical  government  taxes  rent-seeking  supply-demand  incentives  property-rights  africa  developing-world  peace-violence  interests  longitudinal  natural-experiment  endogenous-exogenous  archaeology  trade  world  feudal  roots  ideas  cost-benefit  econ-productivity 
november 2017 by nhaliday
King Kong and Cold Fusion: Counterfactual analysis and the History of Technology
How “contingent” is technological history? Relying on models from evolutionary epistemology, I argue for an analogy with Darwinian Biology and thus a much greater degree of contingency than is normally supposed. There are three levels of contingency in technological development. The crucial driving force behind technology is what I call S-knowledge, that is, an understanding of the exploitable regularities of nature (which includes “science” as a subset). The development of techniques depend on the existence of epistemic bases in S. The “inevitability” of technology thus depends crucially on whether we condition it on the existence of the appropriate S-knowledge. Secondly, even if this knowledge emerges, there is nothing automatic about it being transformed into a technique that is, a set of instructions that transforms knowledge into production. Third, even if the techniques are proposed, there is selection which reflects the preferences and biases of an economy and injects another level of indeterminacy and contingency into the technological history of nations.

Moslem conquest of Europe, or a Mongol conquest, or a post-1492 epidemic, or a victory of the counter-reformation would have prevented the Industrial Revolution (Joel Mokyr)
pdf  study  essay  economics  growth-econ  broad-econ  microfoundations  history  medieval  early-modern  industrial-revolution  divergence  volo-avolo  random  mokyr-allen-mccloskey  wealth-of-nations  europe  the-great-west-whale  occident  path-dependence  roots  knowledge  technology  society  multi  twitter  social  commentary  backup  conquest-empire  war  islam  MENA  disease  parasites-microbiome  counterfactual  age-of-discovery  enlightenment-renaissance-restoration-reformation  usa  scitariat  gnon  degrees-of-freedom 
november 2017 by nhaliday
Ancient Admixture in Human History
- Patterson, Reich et al., 2012
Population mixture is an important process in biology. We present a suite of methods for learning about population mixtures, implemented in a software package called ADMIXTOOLS, that support formal tests for whether mixture occurred and make it possible to infer proportions and dates of mixture. We also describe the development of a new single nucleotide polymorphism (SNP) array consisting of 629,433 sites with clearly documented ascertainment that was specifically designed for population genetic analyses and that we genotyped in 934 individuals from 53 diverse populations. To illustrate the methods, we give a number of examples that provide new insights about the history of human admixture. The most striking finding is a clear signal of admixture into northern Europe, with one ancestral population related to present-day Basques and Sardinians and the other related to present-day populations of northeast Asia and the Americas. This likely reflects a history of admixture between Neolithic migrants and the indigenous Mesolithic population of Europe, consistent with recent analyses of ancient bones from Sweden and the sequencing of the genome of the Tyrolean “Iceman.”
nibble  pdf  study  article  methodology  bio  sapiens  genetics  genomics  population-genetics  migration  gene-flow  software  trees  concept  history  antiquity  europe  roots  gavisti  🌞  bioinformatics  metrics  hypothesis-testing  levers  ideas  libraries  tools  pop-structure 
november 2017 by nhaliday
Lol, that's nothing, my biology teacher in high school told me sex differences couldn't evolve since all of us inherit 50% of genes from parents of both sexes. Being a raucous hispanic kid I burst out laughing, she was not pleased
Sex differences actually evolve more slowly because of that: something like 80 times more slowly.
Doesn't have that number, but in the same ballpark.

Sexual Dimorphism, Sexual Selection, And Adaptation In Polygenic Characters

Russell Lande

other time mentioned: https://pinboard.in/u:nhaliday/b:3a7c5b42dd50
study  article  bio  biodet  gender  gender-diff  evolution  genetics  population-genetics  methodology  nibble  sex  🌞  todo  pdf  piracy  marginal  comparison  pro-rata  data  multi  twitter  social  discussion  backup  west-hunter  scitariat 
november 2017 by nhaliday
Heritability, Assortative Mating and Gender Differences in Violent Crime: Results from a Total Population Sample Using Twin, Adoption, and Sibling Models | SpringerLink
Using 36k twins, violent crime was moderately heritable (~ 55%) w/ 13% shared environment influence. Using 1.5 mil siblings, heritability was higher for males, & family environment higher for females. Moderate assortative mating for violent crime (r = .4).
study  biodet  behavioral-gen  variance-components  crime  criminology  peace-violence  psychology  social-psych  correlation  assortative-mating  🌞  gender  gender-diff  twin-study  sib-study  europe  nordic  environmental-effects 
november 2017 by nhaliday
Stretching and injury prevention: an obscure relationship. - PubMed - NCBI
Sports involving bouncing and jumping activities with a high intensity of stretch-shortening cycles (SSCs) [e.g. soccer and football] require a muscle-tendon unit that is compliant enough to store and release the high amount of elastic energy that benefits performance in such sports. If the participants of these sports have an insufficient compliant muscle-tendon unit, the demands in energy absorption and release may rapidly exceed the capacity of the muscle-tendon unit. This may lead to an increased risk for injury of this structure. Consequently, the rationale for injury prevention in these sports is to increase the compliance of the muscle-tendon unit. Recent studies have shown that stretching programmes can significantly influence the viscosity of the tendon and make it significantly more compliant, and when a sport demands SSCs of high intensity, stretching may be important for injury prevention. This conjecture is in agreement with the available scientific clinical evidence from these types of sports activities. In contrast, when the type of sports activity contains low-intensity, or limited SSCs (e.g. jogging, cycling and swimming) there is no need for a very compliant muscle-tendon unit since most of its power generation is a consequence of active (contractile) muscle work that needs to be directly transferred (by the tendon) to the articular system to generate motion. Therefore, stretching (and thus making the tendon more compliant) may not be advantageous. This conjecture is supported by the literature, where strong evidence exists that stretching has no beneficial effect on injury prevention in these sports.
study  survey  health  embodied  fitness  fitsci  biomechanics  sports  soccer  running  endurance  evidence-based  null-result  realness  contrarianism  homo-hetero  comparison  embodied-pack 
november 2017 by nhaliday
“It could turn ugly”: Selective disclosure of attitudes in political discussion networks - ScienceDirect
We find Americans are more likely to share their opinions with friends and family rather than co-workers and they are more likely to share their opinions on more salient topics. More importantly, they withhold their political attitudes specifically from those with whom they disagree in an attempt to avoid conflict. This produces the experience of highly homogeneous social contexts, in which only liberal or conservative views are voiced, while dissent remains silent, and oftentimes goes unacknowledged. This experience is not the result of homogeneous social contexts but the appearance of them. Paradoxically, the mechanism of selective disclosure, whose goal is to prevent conflict at the micro-level, might lead to the perception of greater division in the larger society.
study  polisci  politics  polarization  roots  network-structure  info-dynamics  realness  homo-hetero  truth  integrity  hypocrisy  preference-falsification  unintended-consequences  tribalism  impro  dark-arts  open-closed 
november 2017 by nhaliday
Politics with Hidden Bases: Unearthing the Deep Roots of Party Systems
The research presented here uses a novel method to show that contemporary party systems may originate much further back than is usually assumed or might be expected—in reality many centuries. Using data on Ireland, a country with a political system that poses significant challenges to the universality of many political science theories, by identifying the ancestry of current party elites we find ethnic bases for the Irish party system arising from population movements that took place from the 12th century. Extensive Irish genealogical knowledge allows us to use surnames as a proxy for ethnic origin. Recent genetic analyses of Irish surnames corroborate Irish genealogical information. The results are particularly compelling given that Ireland is an extremely homogeneous society and therefore provides a tough case for our approach.
pdf  study  broad-econ  polisci  sociology  politics  government  correlation  path-dependence  cliometrics  anglo  britain  history  mostly-modern  time-series  pro-rata  distribution  demographics  coalitions  pop-structure  branches  hari-seldon 
november 2017 by nhaliday
Do High School Sports Build or Reveal Character?
We examine the extent to which participation in high school athletics has beneficial effects on future education, labor market, and health outcomes. Due to the absence of plausible instruments in observational data, we use recently developed methods that relate selection on observables with selection on unobservables to estimate bounds on the causal effect of athletics participation. We analyze these effects in the US separately for men and women using three different nationally representative longitudinal data sets that each link high school athletics participation with later-life outcomes. We do not find consistent evidence of individual benefits reported in many previous studies – once we have accounted for selection, high school athletes are no more likely to attend college, earn higher wages, or participate in the labor force. However, we do find that men (but not women) who participated in high school athletics are more likely to exercise regularly as adults. Nevertheless, athletes are no less likely to be obese.
pdf  study  broad-econ  economics  econometrics  microfoundations  human-capital  sports  intervention  null-result  wonkish  endo-exo  selection  confounding  labor  education  health  fitness  fitsci  org:ngo  white-paper  methodology  compensation  cost-benefit  input-output  endogenous-exogenous  branches 
november 2017 by nhaliday
Genome-wide association analysis identifies 30 new susceptibility loci for schizophrenia | Nature Genetics
We conducted a genome-wide association study (GWAS) with replication in 36,180 Chinese individuals and performed further transancestry meta-analyses with data from the Psychiatry Genomics Consortium (PGC2). Approximately 95% of the genome-wide significant (GWS) index alleles (or their proxies) from the PGC2 study were overrepresented in Chinese schizophrenia cases, including ∼50% that achieved nominal significance and ∼75% that continued to be GWS in the transancestry analysis. The Chinese-only analysis identified seven GWS loci; three of these also were GWS in the transancestry analyses, which identified 109 GWS loci, thus yielding a total of 113 GWS loci (30 novel) in at least one of these analyses. We observed improvements in the fine-mapping resolution at many susceptibility loci. Our results provide several lines of evidence supporting candidate genes at many loci and highlight some pathways for further research. Together, our findings provide novel insight into the genetic architecture and biological etiology of schizophrenia.
study  biodet  behavioral-gen  psychiatry  disease  GWAS  china  asia  race  generalization  genetics  replication 
november 2017 by nhaliday
Fortifications and Democracy in the Ancient Greek World by Josiah Ober, Barry Weingast :: SSRN
- Joshiah Ober, Barry Weingast

In the modern world, access-limiting fortification walls are not typically regarded as promoting democracy. But in Greek antiquity, increased investment in fortifications was correlated with the prevalence and stability of democracy. This paper sketches the background conditions of the Greek city-state ecology, analyzes a passage in Aristotle’s Politics, and assesses the choices of Hellenistic kings, Greek citizens, and urban elites, as modeled in a simple game. The paper explains how city walls promoted democracy and helps to explain several other puzzles: why Hellenistic kings taxed Greek cities at lower than expected rates; why elites in Greek cities supported democracy; and why elites were not more heavily taxed by democratic majorities. The relationship between walls, democracy, and taxes promoted continued economic growth into the late classical and Hellenistic period (4th-2nd centuries BCE), and ultimately contributed to the survival of Greek culture into the Roman era, and thus modernity. We conclude with a consideration of whether the walls-democracy relationship holds in modernity.
study  broad-econ  economics  polisci  political-econ  institutions  government  north-weingast-like  democracy  walls  correlation  polis  history  mediterranean  iron-age  the-classics  microfoundations  modernity  comparison  architecture  military  public-goodish  elite  civic  taxes  redistribution  canon  literature  big-peeps  conquest-empire  rent-seeking  defense  models  GT-101  incentives  urban  urban-rural 
november 2017 by nhaliday
We find that supporters of the major parties (Labour, the Conservatives and the Liberal Democrats) have substantively different personality traits. Moreover, we show that those not identifying with any party, who are close to holding the majority, are similar to those identifying with the Conservatives. We show that these results are robust to controlling for cognitive skills and parental party preferences, and to estimation on a subsample of siblings. The relationship between personality traits and party identification is stable across birth cohorts.

Table 2: Big Five Personality Traits: Predictions.
Figure 3: Relationship between personality traits and stable party identification

Conservative core supporters are antagonistic towards others (low Agreeableness), they are closed to new experiences (low Openness), they are energetic and enthusiastic (high Extraversion), they are goal-orientated (high Conscientiousness), and they are even-tempered (low Neuroticism).

In contrast, the core supporters of the Labour Party have a pro-social and communal attitude (high Agreeableness), they are open to new experiences and ideas (high Openness), but they are more anxious, tense and discontented (high Neuroticism) and less prone to goal-directed behavior (low Conscientiousness). The core supporters of the Liberal Democrats have similar traits to the typical Labour supporters with two exceptions. First, they do not show any particular tendency towards pro-social and communal attitudes (insignificant Agreeableness). Second, they are more reserved and introverted than the more extraverted supporters of either the Conservatives or Labour (low Extraversion).

Psychological and Personality Profiles of Political Extremists: https://arxiv.org/pdf/1704.00119.pdf
We revisit the debate over the appeal of extremism in the U.S. context by comparing publicly available Twitter messages written by over 355,000 political extremist followers with messages written by non-extremist U.S. users. Analysis of text-based psychological indicators supports the moral foundation theory which identifies emotion as a critical factor in determining political orientation of individuals. Extremist followers also differ from others in four of the Big Five personality traits.

Fig. 2. Comparing psychological profiles of the followers of moderate and extremist single-issue groups, compared to random users.

Overall, the differences in psychological profile between followers of extremist and moderate groups is much larger for left-wing extremists (environmentalists) than right-wing (anti-abortion and anti-immigrant).

Fig. 3. Big Five Personality Profiles.

Results show that extremist followers (whether left or right) are less agreeable, less neurotic, and more open than nonextremists.

Ideology as Motivated Cultural Cognition: How Culture Translates Personality into Policy Preferences: https://www.psa.ac.uk/sites/default/files/conference/papers/2017/Ideology%20as%20Motivated%20Cultural%20Cognition.pdf
This paper summarises the results of a quantitative analysis testing the theory that culture acts as an intermediary in the relationship between individual perceptual tendencies and political orientation. Political psychologists have long observed that more “left-wing” individuals tend to be more comfortable than “right-wing” individuals with ambiguity, disorder, and uncertainty, to equivocate more readily between conflicting viewpoints, and to be more willing to change their opinions. These traits are often summarised under the blanket term of “open-mindedness”. A recent increase in cross-cultural studies, however, has indicated that these relationships are far less robust, and even reversed, in social contexts outside of North America and Western Europe. The sociological concept of culture may provide an answer to this inconsistency: emergent idea-networks, irreducible to individuals, which nonetheless condition psychological motivations, so that perceptual factors resulting in left-wing preferences in one culture may result in opposing preferences in another. The key is that open-mindedness leads individuals to attack the dominant ideas which they encounter: if prevailing orthodoxies happen to be left-wing, then open minded individuals may become right-wing in protest. Using conditional process analysis of the British Election Study, I find evidence for three specific mechanisms whereby culture interferes with perceptual influences on politics. Conformity to the locally dominant culture mediates these influences, in the sense that open-minded people in Britain are only more left-wing because they are less culturally conformal. This relationship is itself moderated both by cultural group membership and by Philip Converse’s notion of “constraint”, individual-level connectivity between ideas, such that the strength of perceptual influence differs significantly between cultural groups and between levels of constraint to the idea of the political spectrum. Overall, I find compelling evidence for the importance of culture in shaping perceptions of policy choices.
pdf  study  polisci  sociology  politics  ideology  personality  psych-architecture  correlation  britain  coalitions  phalanges  data  things  multi  preprint  psychology  social-psych  cog-psych  culture-war  gnon  🐸  subculture  objective-measure  demographics  org:mat  creative  culture  society  cultural-dynamics  anthropology  hari-seldon  discipline  extra-introversion  stress  individualism-collectivism  expression-survival  values  poll  chart  curiosity 
november 2017 by nhaliday
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