nhaliday + evidence   16

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]
biodet  deep-materialism  new-religion  evolution  eden  gender  gender-diff  concept  jargon  wiki  reference  bio  roots  explanans  🌞  ideas  EGT  sex  analysis  things  phalanges  matching  parenting  water  competition  egalitarianism-hierarchy  ranking  multi  study  org:nat  nature  meta-analysis  survey  solid-study  male-variability  darwinian  empirical  realness  sapiens  models  evopsych  legacy  investing  uncertainty  outcome-risk  decision-theory  pdf  life-history  chart  accelerationism  horror  capital  capitalism  similarity  analogy  land  gnon  🐸  europe  the-great-west-whale  industrial-revolution  science  kinship  n-factor  speculation  personality  creative  pop-diff  curiosity  altruism  cooperate-defect  anthropology  cultural-dynamics  civil-liberty  recent-selection  technocracy  frontier  futurism  prediction  quotes  aphorism  religion  theos  enhancement  biotech  revolution  insight  history  early-modern  gallic  philosophy  enlightenment-renaissance-restoration-reformation  ci 
january 2018 by nhaliday
Tax Evasion and Inequality
This paper attempts to estimate the size and distribution of tax evasion in rich countries. We combine stratified random audits—the key source used to study tax evasion so far—with new micro-data leaked from two large offshore financial institutions, HSBC Switzerland (“Swiss leaks”) and Mossack Fonseca (“Panama Papers”). We match these data to population-wide wealth records in Norway, Sweden, and Denmark. We find that tax evasion rises sharply with wealth, a phenomenon that random audits fail to capture. On average about 3% of personal taxes are evaded in Scandinavia, but this figure rises to about 30% in the top 0.01% of the wealth distribution, a group that includes households with more than $40 million in net wealth. A simple model of the supply of tax evasion services can explain why evasion rises steeply with wealth. Taking tax evasion into account increases the rise in inequality seen in tax data since the 1970s markedly, highlighting the need to move beyond tax data to capture income and wealth at the top, even in countries where tax compliance is generally high. We also find that after reducing tax evasion—by using tax amnesties—tax evaders do not legally avoid taxes more. This result suggests that fighting tax evasion can be an effective way to collect more tax revenue from the ultra-wealthy.

Figure 1

America’s unreported economy: measuring the size, growth and determinants of income tax evasion in the U.S.: https://link.springer.com/article/10.1007/s10611-011-9346-x
This study empirically investigates the extent of noncompliance with the tax code and examines the determinants of federal income tax evasion in the U.S. Employing a refined version of Feige’s (Staff Papers, International Monetary Fund 33(4):768–881, 1986, 1989) General Currency Ratio (GCR) model to estimate a time series of unreported income as our measure of tax evasion, we find that 18–23% of total reportable income may not properly be reported to the IRS. This gives rise to a 2009 “tax gap” in the range of $390–$540 billion. As regards the determinants of tax noncompliance, we find that federal income tax evasion is an increasing function of the average effective federal income tax rate, the unemployment rate, the nominal interest rate, and per capita real GDP, and a decreasing function of the IRS audit rate. Despite important refinements of the traditional currency ratio approach for estimating the aggregate size and growth of unreported economies, we conclude that the sensitivity of the results to different benchmarks, imperfect data sources and alternative specifying assumptions precludes obtaining results of sufficient accuracy and reliability to serve as effective policy guides.
pdf  study  economics  micro  evidence-based  data  europe  nordic  scale  class  compensation  money  monetary-fiscal  political-econ  redistribution  taxes  madisonian  inequality  history  mostly-modern  natural-experiment  empirical  🎩  cocktail  correlation  models  supply-demand  GT-101  crooked  elite  vampire-squid  nationalism-globalism  multi  pro-rata  usa  time-series  trends  world-war  cold-war  government  todo  planning  long-term  trivia  law  crime  criminology  estimate  speculation  measurement  labor  macro  econ-metrics  wealth  stock-flow  time  density  criminal-justice  frequency  dark-arts  traces  evidence 
october 2017 by nhaliday
Caught in the act | West Hunter
The fossil record is sparse. Let me try to explain that. We have at most a few hundred Neanderthal skeletons, most in pretty poor shape. How many Neanderthals ever lived? I think their population varied in size quite a bit – lowest during glacial maxima, probably highest in interglacials. Their degree of genetic diversity suggests an effective population size of ~1000, but that would be dominated by the low points (harmonic average). So let’s say 50,000 on average, over their whole range (Europe, central Asia, the Levant, perhaps more). Say they were around for 300,000 years, with a generation time of 30 years – 10,000 generations, for a total of five hundred million Neanderthals over all time. So one in a million Neanderthals ends up in a museum: one every 20 generations. Low time resolution!

So if anatomically modern humans rapidly wiped out Neanderthals, we probably couldn’t tell. In much the same way, you don’t expect to find the remains of many dinosaurs killed by the Cretaceous meteor impact (at most one millionth of one generation, right?), or of Columbian mammoths killed by a wave of Amerindian hunters. Sometimes invaders leave a bigger footprint: a bunch of cities burning down with no rebuilding tells you something. But even when you know that population A completely replaced population B, it can be hard to prove that just how it happened. After all, population A could have all committed suicide just before B showed up. Stranger things have happened – but not often.
west-hunter  scitariat  discussion  ideas  data  objektbuch  scale  magnitude  estimate  population  sapiens  archaics  archaeology  pro-rata  history  antiquity  methodology  volo-avolo  measurement  pop-structure  density  time  frequency  apollonian-dionysian  traces  evidence 
september 2017 by nhaliday
The Data We Have vs. the Data We Need: A Comment on the State of the “Divergence” Debate (Part I) | The NEP-HIS Blog
https://nephist.wordpress.com/2017/06/06/the-data-we-have-vs-the-data-we-need-a-comment-on-the-state-of-the-divergence-debate-part-ii/
https://twitter.com/pseudoerasmus/status/832260704690434048
Maybe as reaction to Pomeranz, the Great Divergence gets dated earlier & earlier & earlier on the slimmest evidence. Next: Pangaea breakup
https://twitter.com/pseudoerasmus/status/876088100774174720
I think it's a bit out of control, the urge to keep bringing the roots of the great divergence earlier and earlier and earlier
https://twitter.com/pseudoerasmus/status/628527390453538816
@s8mb @antonhowes I am impatient w explanations which do not start w origination/adoption/diffusion technology as proximate cause
@s8mb @antonhowes in respect of which finance, market integration, & formal institutions all dead ends for divergence of West with the Rest
https://twitter.com/pseudoerasmus/status/847054219790159879
Are you more with Pomeranz that there's not major difference until c. 1750 or 1800, or do you put departure much earlier?
it's now beyond doubt established there was a major diff in living standards, state capacity, market integr+
between the most advanced regions of China and the most advanced regions of Europe, no doubt
https://twitter.com/pseudoerasmus/status/534328741754048512
@bswud +broadberry estimates evidence groupthink on matter (i.e., everyone wants to locate precursor to IR earlier and earlier) @antonhowes

The Little Divergence: https://pseudoerasmus.com/2014/06/12/the-little-divergence/
http://voxeu.org/article/european-and-asian-incomes-1914-new-take-great-divergence
The Early Transformation of Britain's Economy: https://growthecon.com/blog/Britain-Shares/
There’s a nice working paper out by Patrick Wallis, Justin Colson, and David Chilosi called “Puncturing the Malthus Delusion: Structural Change in the British Economy before the Industrial Revolution, 1500-1800”. The big project they undertake here is to mine the probate inventories (along with several other sources) from Britain in this period to build up a picture of the rough allocation of workers across sectors. They do a very nice job of walking through their data sources, and the limitations, in the paper, so let me leave those details aside. In short, they use the reported occupations in wills to back out a picture of the sectoral structure, finding it consistent with other sources based on apprentice records, as well as prior estimates from specific years.

http://scholars-stage.blogspot.com/2013/11/another-look-at-rise-of-west-but-with.html
econotariat  commentary  broad-econ  growth-econ  divergence  history  early-modern  world  europe  the-great-west-whale  china  asia  sinosphere  comparison  chart  critique  measurement  debate  pseudoE  multi  wealth-of-nations  econ-metrics  twitter  social  discussion  lol  troll  rant  org:ngo  🎩  s:*  unaffiliated  occident  orient  article  cliometrics  economics  data  mostly-modern  japan  usa  india  anglo  pre-ww2  medieval  roots  path-dependence  revolution  stylized-facts  industrial-revolution  time-series  wealth  visualization  malthus  econ-productivity  technology  ideas  marginal  hari-seldon  flux-stasis  questions  agriculture  heavy-industry  labor  distribution  evidence 
june 2017 by nhaliday
Biological Measures of the Standard of Living - American Economic Association
https://academic.oup.com/oep/article-abstract/66/2/349/2362600/How-have-Europeans-grown-so-tall
The evidence suggests that the most important proximate source of increasing height was the improving disease environment as reflected by the fall in infant mortality. Rising income and education and falling family size had more modest effects. Improvements in health care are hard to identify, and the effects of welfare state spending seem to have been small.

GROWING TALL BUT UNEQUAL: NEW FINDINGS AND NEW BACKGROUND EVIDENCE ON ANTHROPOMETRIC WELFARE IN 156 COUNTRIES, 18101989: https://pseudoerasmus.files.wordpress.com/2017/03/baten-blum-2012.pdf
This is the first initiative to collate the entire body of anthropometric evidence during the 19th and 20th centuries, on a global scale. By providing a comprehensive dataset on global height developments we are able to emphasise an alternative view of the history of human well-being and a basis for understanding characteristics of well-being in 156 countries, 1810-1989.

Bones of Contention: The Political Economy of Height Inequality: http://piketty.pse.ens.fr/files/BoixRosenbluth2014.pdf
- Carles Boix, et al.

Height in the Dark Ages: https://pseudoerasmus.com/2014/06/12/aside-angus-maddison/
study  economics  growth-econ  broad-econ  history  early-modern  mostly-modern  measurement  methodology  embodied  health  longevity  sapiens  death  wealth  pseudoE  🎩  multi  epidemiology  public-health  roots  europe  policy  wonkish  healthcare  redistribution  welfare-state  disease  parasites-microbiome  wealth-of-nations  education  top-n  data  world  pdf  political-econ  inequality  farmers-and-foragers  leviathan  archaeology  🌞  article  time-series  civilization  iron-age  mediterranean  medieval  gibbon  the-classics  demographics  gender  britain  evidence  traces 
june 2017 by nhaliday
Lucio Russo - Wikipedia
In The Forgotten Revolution: How Science Was Born in 300 BC and Why It Had to Be Reborn (Italian: La rivoluzione dimenticata), Russo promotes the belief that Hellenistic science in the period 320-144 BC reached heights not achieved by Classical age science, and proposes that it went further than ordinarily thought, in multiple fields not normally associated with ancient science.

La Rivoluzione Dimenticata (The Forgotten Revolution), Reviewed by Sandro Graffi: http://www.ams.org/notices/199805/review-graffi.pdf

Before turning to the question of the decline of Hellenistic science, I come back to the new light shed by the book on Euclid’s Elements and on pre-Ptolemaic astronomy. Euclid’s definitions of the elementary geometric entities—point, straight line, plane—at the beginning of the Elements have long presented a problem.7 Their nature is in sharp contrast with the approach taken in the rest of the book, and continued by mathematicians ever since, of refraining from defining the fundamental entities explicitly but limiting themselves to postulating the properties which they enjoy. Why should Euclid be so hopelessly obscure right at the beginning and so smooth just after? The answer is: the definitions are not Euclid’s. Toward the beginning of the second century A.D. Heron of Alexandria found it convenient to introduce definitions of the elementary objects (a sign of decadence!) in his commentary on Euclid’s Elements, which had been written at least 400 years before. All manuscripts of the Elements copied ever since included Heron’s definitions without mention, whence their attribution to Euclid himself. The philological evidence leading to this conclusion is quite convincing.8

...

What about the general and steady (on the average) impoverishment of Hellenistic science under the Roman empire? This is a major historical problem, strongly tied to the even bigger one of the decline and fall of the antique civilization itself. I would summarize the author’s argument by saying that it basically represents an application to science of a widely accepted general theory on decadence of antique civilization going back to Max Weber. Roman society, mainly based on slave labor, underwent an ultimately unrecoverable crisis as the traditional sources of that labor force, essentially wars, progressively dried up. To save basic farming, the remaining slaves were promoted to be serfs, and poor free peasants reduced to serfdom, but this made trade disappear. A society in which production is almost entirely based on serfdom and with no trade clearly has very little need of culture, including science and technology. As Max Weber pointed out, when trade vanished, so did the marble splendor of the ancient towns, as well as the spiritual assets that went with it: art, literature, science, and sophisticated commercial laws. The recovery of Hellenistic science then had to wait until the disappearance of serfdom at the end of the Middle Ages. To quote Max Weber: “Only then with renewed vigor did the old giant rise up again.”

...

The epilogue contains the (rather pessimistic) views of the author on the future of science, threatened by the apparent triumph of today’s vogue of irrationality even in leading institutions (e.g., an astrology professorship at the Sorbonne). He looks at today’s ever-increasing tendency to teach science more on a fideistic than on a deductive or experimental basis as the first sign of a decline which could be analogous to the post-Hellenistic one.

Praising Alexandrians to excess: https://sci-hub.tw/10.1088/2058-7058/17/4/35
The Economic Record review: https://sci-hub.tw/10.1111/j.1475-4932.2004.00203.x

listed here: https://pinboard.in/u:nhaliday/b:c5c09f2687c1

Was Roman Science in Decline? (Excerpt from My New Book): https://www.richardcarrier.info/archives/13477
people  trivia  cocktail  history  iron-age  mediterranean  the-classics  speculation  west-hunter  scitariat  knowledge  wiki  ideas  wild-ideas  technology  innovation  contrarianism  multi  pdf  org:mat  books  review  critique  regularizer  todo  piracy  physics  canon  science  the-trenches  the-great-west-whale  broad-econ  the-world-is-just-atoms  frontier  speedometer  🔬  conquest-empire  giants  economics  article  growth-econ  cjones-like  industrial-revolution  empirical  absolute-relative  truth  rot  zeitgeist  gibbon  big-peeps  civilization  malthus  roots  old-anglo  britain  early-modern  medieval  social-structure  limits  quantitative-qualitative  rigor  lens  systematic-ad-hoc  analytical-holistic  cycles  space  mechanics  math  geometry  gravity  revolution  novelty  meta:science  is-ought  flexibility  trends  reason  applicability-prereqs  theory-practice  traces  evidence 
may 2017 by nhaliday
INFECTIOUS CAUSATION OF DISEASE: AN EVOLUTIONARY PERSPECTIVE
A New Germ Theory: https://www.theatlantic.com/magazine/archive/1999/02/a-new-germ-theory/377430/
The dictates of evolution virtually demand that the causes of some of humanity's chronic and most baffling "noninfectious" illnesses will turn out to be pathogens -- that is the radical view of a prominent evolutionary biologist

A LATE-SEPTEMBER heat wave enveloped Amherst College, and young people milled about in shorts or sleeveless summer frocks, or read books on the grass. Inside the red-brick buildings framing the leafy quadrangle students listened to lectures on Ellison and Emerson, on Paul Verlaine and the Holy Roman Empire. Few suspected that strains of the organism that causes cholera were growing nearby, in the Life Sciences Building. If they had known, they would probably not have grasped the implications. But these particular strains of cholera make Paul Ewald smile; they are strong evidence that he is on the right track. Knowing the rules of evolutionary biology, he believes, can change the course of infectious disease.

https://www.theatlantic.com/past/docs/issues/99feb/germ2.htm
I HAVE a motto," Gregory Cochran told me recently. "'Big old diseases are infectious.' If it's common, higher than one in a thousand, I get suspicious. And if it's old, if it has been around for a while, I get suspicious."

https://www.theatlantic.com/past/docs/issues/99feb/germ3.htm
pdf  study  speculation  bio  evolution  sapiens  parasites-microbiome  red-queen  disease  west-hunter  🌞  unit  nibble  len:long  biodet  EGT  wild-ideas  big-picture  epidemiology  deep-materialism  🔬  spearhead  scitariat  maxim-gun  ideas  lens  heterodox  darwinian  equilibrium  medicine  heuristic  spreading  article  psychiatry  QTL  distribution  behavioral-gen  genetics  population-genetics  missing-heritability  gender  sex  sexuality  cardio  track-record  aging  popsci  natural-experiment  japan  asia  meta:medicine  profile  ability-competence  empirical  theory-practice  data  magnitude  scale  cost-benefit  is-ought  occam  parsimony  stress  GWAS  roots  explanans  embodied  obesity  geography  canada  britain  anglo  trivia  cocktail  shift  aphorism  stylized-facts  evidence  inference 
february 2017 by nhaliday
Noise: dinosaurs, syphilis, and all that | West Hunter
Generally speaking, I thought the paleontologists were a waste of space: innumerate, ignorant about evolution, and simply not very smart.

None of them seemed to understand that a sharp, short unpleasant event is better at causing a mass extinction, since it doesn’t give flora and fauna time to adapt.

Most seemed to think that gradual change caused by slow geological and erosion forces was ‘natural’, while extraterrestrial impact was not. But if you look at the Moon, or Mars, or the Kirkwood gaps in the asteroids, or think about the KAM theorem, it is apparent that Newtonian dynamics implies that orbits will be perturbed, and that sometimes there will be catastrophic cosmic collisions. Newtonian dynamics is as ‘natural’ as it gets: paleontologists not studying it in school and not having much math hardly makes it ‘unnatural’.

One of the more interesting general errors was not understanding how to to deal with noise – incorrect observations. There’s a lot of noise in the paleontological record. Dinosaur bones can be eroded and redeposited well after their life times – well after the extinction of all dinosaurs. The fossil record is patchy: if a species is rare, it can easily look as if it went extinct well before it actually did. This means that the data we have is never going to agree with a perfectly correct hypothesis – because some of the data is always wrong. Particularly true if the hypothesis is specific and falsifiable. If your hypothesis is vague and imprecise – not even wrong – it isn’t nearly as susceptible to noise. As far as I can tell, a lot of paleontologists [ along with everyone in the social sciences] think of of unfalsifiability as a strength.

Done Quickly: https://westhunt.wordpress.com/2011/12/03/done-quickly/
I’ve never seen anyone talk about it much, but when you think about mass extinctions, you also have to think about rates of change

You can think of a species occupying a point in a many-dimensional space, where each dimension represents some parameter that influences survival and/or reproduction: temperature, insolation, nutrient concentrations, oxygen partial pressure, toxin levels, yada yada yada. That point lies within a zone of habitability – the set of environmental conditions that the species can survive. Mass extinction occurs when environmental changes are so large that many species are outside their comfort zone.

The key point is that, with gradual change, species adapt. In just a few generations, you can see significant heritable responses to a new environment. Frogs have evolved much greater tolerance of acidification in 40 years (about 15 generations). Some plants in California have evolved much greater tolerance of copper in just 70 years.

As this happens, the boundaries of the comfort zone move. Extinctions occur when the rate of environmental change is greater than the rate of adaptation, or when the amount of environmental change exceeds the limit of feasible adaptation. There are such limits: bar-headed geese fly over Mt. Everest, where the oxygen partial pressure is about a third of that at sea level, but I’m pretty sure that no bird could survive on the Moon.

...

Paleontologists prefer gradualist explanations for mass extinctions, but they must be wrong, for the most part.
disease  science  critique  rant  history  thinking  regularizer  len:long  west-hunter  thick-thin  occam  social-science  robust  parasites-microbiome  early-modern  parsimony  the-trenches  bounded-cognition  noise-structure  signal-noise  scitariat  age-of-discovery  sex  sexuality  info-dynamics  alt-inst  map-territory  no-go  contradiction  dynamical  math.DS  space  physics  mechanics  archaeology  multi  speed  flux-stasis  smoothness  evolution  environment  time  shift  death  nihil  inference  apollonian-dionysian  error  explanation  spatial  discrete  visual-understanding  consilience  traces  evidence 
september 2016 by nhaliday

related tags

ability-competence  absolute-relative  academia  accelerationism  accuracy  age-of-discovery  aging  agriculture  algorithmic-econ  alt-inst  altruism  analogy  analysis  analytical-holistic  anglo  anthropology  antiquity  aphorism  apollonian-dionysian  applicability-prereqs  approximation  archaeology  archaics  arrows  article  asia  backup  behavioral-gen  biases  big-peeps  big-picture  big-surf  bio  biodet  biotech  books  bounded-cognition  britain  broad-econ  canada  canon  capital  capitalism  cardio  chart  china  civil-liberty  civilization  cjones-like  class  cliometrics  cocktail  cog-psych  cold-war  commentary  comparison  compensation  competition  complexity  concept  conquest-empire  consilience  contradiction  contrarianism  cooperate-defect  correlation  cost-benefit  creative  crime  criminal-justice  criminology  critique  crooked  crypto  cultural-dynamics  curiosity  cycles  dark-arts  darwinian  data  death  debate  decision-theory  deep-materialism  demographics  dennett  density  direct-indirect  discovery  discrete  discussion  disease  distribution  divergence  dynamical  early-modern  ecology  econ-metrics  econ-productivity  econometrics  economics  econotariat  eden  education  egalitarianism-hierarchy  EGT  elite  embodied  empirical  endogenous-exogenous  enhancement  enlightenment-renaissance-restoration-reformation  environment  epidemiology  epistemic  equilibrium  error  estimate  europe  evidence  evidence-based  evolution  evopsych  explanans  explanation  farmers-and-foragers  fitness  fitsci  flexibility  flux-stasis  foreign-lang  frequency  frontier  futurism  gallic  game-theory  garett-jones  gender  gender-diff  genetics  geography  geometry  giants  gibbon  gnon  google  government  graphs  gravity  growth-econ  GT-101  GWAS  hardness  hari-seldon  health  healthcare  heavy-industry  heterodox  heuristic  hidden-motives  history  horror  ideas  illusion  india  industrial-revolution  inequality  inference  info-dynamics  info-foraging  innovation  insight  interests  investing  iron-age  is-ought  japan  jargon  kinship  knowledge  labor  land  language  law  learning  left-wing  legacy  len:long  lens  leviathan  life-history  limits  logic  lol  long-term  longevity  lower-bounds  macro  madisonian  magnitude  male-variability  malthus  map-territory  marginal  matching  math  math.DS  maxim-gun  measurement  mechanics  medicine  medieval  mediterranean  meta-analysis  meta:medicine  meta:science  metabuch  metameta  methodology  micro  missing-heritability  models  monetary-fiscal  money  mostly-modern  motivation  multi  n-factor  nationalism-globalism  natural-experiment  nature  neurons  new-religion  news  nibble  nietzschean  nihil  no-go  noise-structure  nordic  novelty  nutrition  obesity  objektbuch  occam  occident  old-anglo  open-problems  org:edu  org:junk  org:lite  org:mat  org:nat  org:ngo  org:popup  orient  outcome-risk  overflow  parallax  parasites-microbiome  parenting  parsimony  path-dependence  pdf  people  personality  persuasion  phalanges  philosophy  physics  piracy  planning  policy  political-econ  pop-diff  pop-structure  popsci  population  population-genetics  pre-ww2  prediction  pro-rata  profile  pseudoE  pseudorandomness  psychiatry  psychology  public-health  q-n-a  qra  QTL  quantitative-qualitative  questions  quotes  rand-complexity  ranking  rant  rationality  realness  reason  recent-selection  recommendations  red-queen  reddit  redistribution  reference  regularizer  relativization  religion  research  review  revolution  rigor  rigorous-crypto  robust  roots  rot  s:*  sapiens  scale  science  scitariat  self-interest  sex  sexuality  shift  signal-noise  similarity  singularity  sinosphere  skeleton  sky  smoothness  social  social-science  social-structure  solid-study  space  spatial  spearhead  speculation  speed  speedometer  spock  spreading  stock-flow  stress  study  stylized-facts  subjective-objective  summary  supply-demand  survey  systematic-ad-hoc  taxes  tcs  technocracy  technology  the-basilisk  the-classics  the-great-west-whale  the-self  the-trenches  the-world-is-just-atoms  theory-of-mind  theory-practice  theos  thick-thin  things  thinking  time  time-complexity  time-series  todo  top-n  traces  track-record  trends  trivia  troll  truth  twitter  unaffiliated  uncertainty  unit  usa  vampire-squid  visual-understanding  visualization  volo-avolo  water  wealth  wealth-of-nations  welfare-state  west-hunter  wiki  wild-ideas  within-without  wonkish  world  world-war  zeitgeist  🌞  🎩  🐸  🔬 

Copy this bookmark:



description:


tags: