econotariat   623

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More arguments against blockchain, most of all about trust - Marginal REVOLUTION
Auditing software is hard! The most-heavily scrutinized smart contract in history had a small bug that nobody noticed — that is, until someone did notice it, and used it to steal fifty million dollars. If cryptocurrency enthusiasts putting together a $150m investment fund can’t properly audit the software, how confident are you in your e-book audit? Perhaps you would rather write your own counteroffer software contract, in case this e-book author has hidden a recursion bug in their version to drain your ethereum wallet of all your life savings?

It’s a complicated way to buy a book! It’s not trustless, you’re trusting in the software (and your ability to defend yourself in a software-driven world), instead of trusting other people.
econotariat  marginal-rev  links  commentary  quotes  bitcoin  cryptocurrency  blockchain  crypto  trust  money  monetary-fiscal  technology  software  institutions  government  comparison  cost-benefit  primitivism  eden-heaven 
april 2018 by nhaliday
My March 28 talk at MIT - Marginal REVOLUTION
What happens when a simulated system becomes more real than the system itself?  Will the internet become “more real” than the world of ideas it is mirroring? Do we academics live in a simulacra?  If the “alt right” exists mainly on the internet, does that make it more or less powerful?  Do all innovations improve system quality, and if so why is a lot of food worse than before and home design was better in 1910-1930?  How does the world of ideas fit into this picture?
econotariat  marginal-rev  links  quotes  presentation  hmm  simulation  realness  internet  academia  gnon  🐸  subculture  innovation  food  trends  architecture  history  mostly-modern  pre-ww2 
march 2018 by nhaliday
Strategic height adjustment - Marginal REVOLUTION
Professor Bogin’s study, carried out in collaboration with Dr Christiane Scheffler, at the University of Potsdam, and Professor Michael Hermanussen, from the University of Kiel, also explored a second phenomenon called competitive growth — where the ruling social classes adjust their height to exceed the subordinate population.

Prof Bogin said: “This is when the mean height of colonial or military migrants, who become the socially dominant group in the conquered country, surpasses the average height of the both the conquered people and the origin population.”

In one example, the researchers found that the height of Dutch colonial masters in Indonesia in the 19th and early 20th centuries was greater than the Indonesians they ruled, and also greater than social upper classes back in the Netherlands.

“This was also the case for English colonial masters in North America,” said Prof Bogin.

“We find that it is the superior social status of the conquerors that promotes their greater height.
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march 2018 by nhaliday
The Falling Price of Fat | Pseudoerasmus
Summary : There are too many baroque explanations for the increased prevalence of obesity. I suggest a simple mechanism : falling food prices, rising incomes.
econotariat  broad-econ  pseudoE  economics  supply-demand  food  obesity  trends  explanans  cynicism-idealism  money  compensation  cost-benefit  backup  epidemiology  public-health  roots 
february 2018 by nhaliday
Adam Smith, David Hume, Liberalism, and Esotericism - Call for Papers - Elsevier
https://twitter.com/davidmanheim/status/963071765995032576
https://archive.is/njT4P
A very good economics journal--famously an outlet for rigorous, outside the box thinking--is publishing a special issue on hidden meanings in the work of two of the world's greatest thinkers.

Another sign the new Straussian age is upon us: Bayesians update accordingly!
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february 2018 by nhaliday
Reid Hofmann and Peter Thiel and technology and politics - Marginal REVOLUTION
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february 2018 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.

Men Are Animals: http://www.overcomingbias.com/2018/06/men-are-animals.html
I agree with all the comments citing motility/sessility.
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january 2018 by nhaliday
Self-Serving Bias | Slate Star Codex
Since reading Tabarrok’s post, I’ve been trying to think of more examples of this sort of thing, especially in medicine. There are way too many discrepancies in approved medications between countries to discuss every one of them, but did you know melatonin is banned in most of Europe? (Europeans: did you know melatonin is sold like candy in the United States?) Did you know most European countries have no such thing as “medical school”, but just have college students major in medicine, and then become doctors once they graduate from college? (Europeans: did you know Americans have to major in some random subject in college, and then go to a separate place called “medical school” for four years to even start learning medicine?) Did you know that in Puerto Rico, you can just walk into a pharmacy and get any non-scheduled drug you want without a doctor’s prescription? (source: my father; I have never heard anyone else talk about this, and nobody else even seems to think it is interesting enough to be worth noting).

...

And then there’s the discussion from the recent discussion of Madness and Civilization about how 18th century doctors thought hot drinks will destroy masculinity and ruin society. Nothing that’s happened since has really disproved this – indeed, a graph of hot drink consumption, decline of masculinity, and ruinedness of society would probably show a pretty high correlation – it’s just somehow gotten tossed in the bin marked “ridiculous” instead of the bin marked “things we have to worry about”.
🤔🤔
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january 2018 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.
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january 2018 by nhaliday
Team *Decorations Until Epiphany* on Twitter: "@RoundSqrCupola maybe just C https://t.co/SFPXb3qrAE"
https://archive.is/k0fsS
Remember ‘BRICs’? Now it’s just ICs.
--
maybe just C
Solow predicts that if 2 countries have the same TFP, then the poorer nation should grow faster. But poorer India grows more slowly than China.

Solow thinking leads one to suspect India has substantially lower TFP.

Recent growth is great news, but alas 5 years isn't the long run!

FWIW under Solow conditional convergence assumptions--historically robust--the fact that a country as poor as India grows only a few % faster than the world average is a sign they'll end up poorer than S Europe.
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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.
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december 2017 by nhaliday
The Grumpy Economist: Bitcoin and Bubbles
Bitcoin is not a very good money. It is a pure fiat money (no backing), whose value comes from limited supply plus these demands. As such it has the huge price fluctuations we see. It's an electronic version of gold, and the price variation should be a warning to economists who long for a return to  gold. My bet is that stable-value cryptocurrencies, offering one dollar per currency unit and low transactions costs, will prosper in the role of money. At least until there is a big inflation or sovereign debt crisis and a stable-value cryptocurrency not linked to government debt emerges.

https://twitter.com/GarettJones/status/939242620869660672
https://archive.is/Rrbg6
The Kareken-Wallace Cryptocurrency Price Indeterminacy theorem will someday receive the attention it deserves

https://www.mercatus.org/system/files/cryptocurrency-article.pdf
Cryptocurrencies also raise in a new way questions of exchange rate indeterminacy. As Kareken and Wallace (1981) observed, fiat currencies are all alike: slips of paper not redeemable for anything. Under a regime of floating exchange rates and no capital controls, and assuming some version of interest rate parity holds, there are an infinity of exchange rates between any two fiat currencies that constitute an equilibrium in their model.

The question of exchange rate indeterminacy is both more and less striking between cryptocurrencies than between fiat currencies. It is less striking because there are considerably more differences between cryptocurrencies than there are between paper money. Paper money is all basically the same. Cryptocurrencies sometimes have different characteristics from each other. For example, the algorithm used as the basis for mining makes a difference – it determines how professionalised the mining pools become. Litecoin uses an algorithm that tends to make mining less concentrated. Another difference is the capability of the cryptocurrency’s language for programming transactions. Ethereum is a new currency that boasts a much more robust language than Bitcoin. Zerocash is another currency that offers much stronger anonymity than Bitcoin. To the extent that cryptocurrencies differ from each other more than fiat currencies do, those differences might be able to pin down exchange rates in a model like Kareken and Wallace’s.

On the other hand, exchange rate indeterminacy could be more severe among cryptocurrencies than between fiat currencies because it is easy to simply create an exact copy of an open source cryptocurrency. There are even websites on which you can create and download the software for your own cryptocurrency with a few clicks of a mouse. These currencies are exactly alike except for their names and other identifying information. Furthermore, unlike fiat currencies, they don’t benefit from government acceptance or optimal currency area considerations that can tie a currency to a given territory.

Even identical currencies, however, can differ in terms of the quality of governance. Bitcoin currently has high quality governance institutions. The core developers are competent and conservative, and the mining and user communities are serious about making the currency work. An exact Bitcoin clone is likely to have a difficult time competing with Bitcoin unless it can promise similarly high-quality governance. When a crisis hits, users of identical currencies are going to want to hold the one that is mostly likely to weather the storm. Consequently, between currencies with identical technical characteristics, we think governance creates something close to a winner-take-all market. Network externalities are very strong in payment systems, and the governance question with respect to cryptocurrencies in particular compounds them.

https://twitter.com/GarettJones/status/939259281039380480
https://archive.is/ldof8
Explaining a price rise via future increases in the asset's value isn't good economics. The invisible hand should be pushing today's price up to the point where it earns normal expected returns. +
I don't doubt the likelihood of a future cryptocurrency being widely used, but that doesn't pin down the price of any one cryptocurrency as the Kareken-Wallace result shows. There may be a big first mover advantage for Bitcoin but ease of replication makes it a fragile dominance.

https://twitter.com/netouyo_/status/939566116229218306
https://archive.is/CtE6Q
I actually can't believe governments are allowing bitcoin to exist (they must be fully on board with going digital at some point)

btc will eventually come in direct competition with national currencies, which will have to raise rates dramatically, or die

http://www.thebigquestions.com/2017/12/08/matters-of-money/
The technology of Bitcoin Cash is very similar to the technology of Bitcoin. It offers the same sorts of anonymity, security, and so forth. There are some reasons to believe that in the future, Bitcoin Cash will be a bit easier to trade than Bitcoin (though that is not true in the present), and there are some other technological differences between them, but I’d be surprised to learn that those differences are accounting for any substantial fraction of the price differential.

The total supplies of Bitcoins and of Bitcoin Cash are currently about equal (because of the way that Bitcoin Cash originated). In each case, the supply will gradually grow to 21 million and then stop.

Question 1: Given the near identical properties of these two currencies, how can one sell for ten times the price of the other? Perhaps the answer involves the word “bubble”, but I’d be more interested in answers that assume (at least for the sake of argument) that the price of Bitcoin fairly reflects its properties as a store of value. Given that assumption, is the price differential entirely driven by the fact that Bitcoin came first? Is there that much of a first-mover advantage in this kind of game?

Question 2: Given the existence of other precious metals (e.g. platinum) what accounts for the dominance of gold as a physical store of value? (I note, for example, that when people buy gold as a store of value, they don’t often hesitate out of fear that gold will be displaced by platinum in the foreseeable future.) Is this entirely driven by the fact that gold happened to come first?

Question 3: Are Questions 1 and 2 the same question? Are the dominance of Bitcoin in the digital store-of-value market and the dominance of gold in the physical store-of-value market two sides of the same coin, so to speak? Or do they require fundamentally different explanations?

https://twitter.com/GarettJones/status/944582032780382208
https://archive.is/kqTXg
Champ/Freeman in 2001 explain why the dollar-bitcoin exchange rate is inherently unstable, and why the price of cryptocurrencies is indeterminate:

https://twitter.com/GarettJones/status/945046058073071617
https://archive.is/Y0OQB
Lay down a marker:
And remember that the modern macro dogma is that monetary systems matter little for prosperity, once bare competence is achieved.
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december 2017 by nhaliday

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