Swedish population-wide n=2100, adoption study for education & income. Looks like non-trivial C effects to me. https://academic.oup.com/qje/article-abstract/121/3/999/1917900/The-Origins-of-Intergenerational-Associations …pic.twitter.com/pkEm0L4nbB
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That depends on what they looked at. I don't take C findings from that era in Sweden seriously for that reason.
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