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Emil Kirkegaard Profile picture
@KirkegaardEmil
Aug 14, 2023 • 4 tweets • 2 min read • Read on X
Private market fans are usually a fan of private education. The trouble is that educational outcomes are mostly just genetics, so there isn't much room for improvement. One way to study this is to look at school voucher randomized trials.

This meta-analysis shows that they don't do anything for reading or math ability in the West. The results for non-Western countries are larger, but not very trustworthy due to rampant scientific misconduct in those countries. Shrug tier.

Private education probably preferable on other grounds, but not for actual learning outcomes.

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The Participant Effects of Private School Vouchers Across the Globe: A Meta-Analytic and Systematic Review

papers.ssrn.com/sol3/papers.cf…
Reminders about rampant scientific dishonesty outside the West.

emilkirkegaard.com/p/scientific-m…
Randomized trials from outside the West very often have fraudulent or impossible data.

…-publications.onlinelibrary.wiley.com/doi/abs/10.111…

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More from @KirkegaardEmil

Emil Kirkegaard Profile picture
Sep 17
This post is going viral, so I decided to dig into the question of why homosexual relationships dissolve more frequently, and especially lesbians. Image
This is the original figure from the study. This shows us that formal unions are much more stable, not so surprisingly. Note the lack of error bars. Image
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The gay stability finding is in fact non-significant and they for some reason plotted models 2 and 5 instead of 3 and 6. Image
Read 10 tweets
Emil Kirkegaard Profile picture
Sep 7
Using data from across the world, we estimated the speed of selection against intelligence across countries. Image
There is a certain regionality to the data Image
Relatively atheistic north Europeans have apparently quite weak selection, while more religious areas have stronger negative selection. This is the opposite of what American data suggested when studying individuals. Image
Read 7 tweets
Emil Kirkegaard Profile picture
Aug 23
Some big accounts as asking why so many MAGA types are suddenly so very anti-Indian, considering that Indians in the US and to some degree in the rest of the West, are model immigrants (high performance, low crime). The main answer is not difficult to understand. Image
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This answer is based on the typical finding of sociology. In terms of partisanship, whichever groups in society you dislike is just the ones you perceive to be most different from you politically. Brandt and colleagues worked this out in 2014. Image
On top of this general pattern, there's the fact that importing a bunch of foreign workers depress local salaries. That is of course why the companies do this. What's the largest source of such foreigners? India. So capitalists love them (cheaper labor) and workers dislike them (suppress their wages).Image
Read 5 tweets
Emil Kirkegaard Profile picture
Aug 16
Maybe you've seen a map like this one. It gives one the impression that Europeans were uniquely or particularly evil regarding slavery, in this case of Africans. Image
However, slavery was more or less a human universal. Pre-Columbian Americas, ancient China, or the Islamic world. Image
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Europeans, rather than being the master enslavers (which they were also for a time), were rather the liberators. The only group of people who decided to take matters into their hands to free the slaves of the world.

reddit.com/r/MapPorn/comm…Image
Read 5 tweets
Emil Kirkegaard Profile picture
Jun 29
Lewis Terman thought that the average American would be a believer in egalitarianism regarding sexes, races etc., and that was in 1922. Image
archive.org/details/worlds…
"Once dull, always dull". Special education classes have very good metrics for teacher education and students per teacher, but they don't seem to improve much from this extra effort. So Terman infers from this that these factors cannot be of great importance. Image
Read 6 tweets
Emil Kirkegaard Profile picture
Jun 28
New study of 2700 Indian whole genomes shows that Indo-European/Yamnaya/Steppe is quite low, about 15%. It is a bit higher in the north (almost 20%) and among those who speak IE languages, but not impressively so. Too much mixing since the arrival. Image
Inbreeding is strong. The median person had identical blocks in their genome at the level suggesting their parents were 3rd cousins, whereas the human average is about close to 4th cousins (Africans less). Image
Annoyingly, the data is not public, even though American taxpayers paid for this. Can't wait for Trump admin to maybe do something about this abuse (inb4 fell for it again award). Image
Read 4 tweets

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