Forget about the 14 words, 6 is the new black. https://www.npr.org/2013/06/27/195967886/six-words-black-babies-cost-less-to-adopt … (2013)pic.twitter.com/an9IzbwTGr
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Assuming anyone tracks them. Just because there are millions of adoptions doesn't mean there's usable records etc. It's entirely possible there's nothing usable. Kind of the way MZA studies have almost stopped entirely because MZ twins are no longer placed separately.
There are large longitudinal datasets of adoptees. Most have basic outcomes like education, but some have achievement scores and IQ.
Presume you need $$$ to access?
Usually free, but you need a professor to apply for access.
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