Determinism
razib | April 20, 2009Bryan Caplan notes & argues:
If you take a closer look at BG research, though, you'll notice something interesting. Virtually every BG study partitions variance into three sources: genes, shared family environment, and non-shared environment. Typical estimates are something like 40-50% for genes, 0-10% for shared family environment, and 50% for non-shared environment.
And what exactly is non-shared environment? Everything other than genes and family environment!
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Nevertheless, I strongly suspect that if non-shared environment's contribution to behavioral variance were a lot smaller…