I'll put it to you, Twitter:
Should @ezraklein and I do a podcast together?
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We don't yet have good data on the polygenic IQ scores across populations, whether they show structural invariance, and how they relate to ancestry informative markers. In 5-10 years, we will. Til then, genetic influences on group differences are very hard to measure.
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Tep. Heritability is specific to population, context, and cohort. Height has a heritability of about 80% within a cohort, but height can increase dramatically across generations with improved nutrition and medicine (e.g. in China now). Same might have been happening with IQ.
End of conversation
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