Getting caught after violent crime 45% heritable. Correlation with committing crime unknown. Maybe twin A learned from B's error.
Violent crime is about 45% heritable, with c. 24% influence from shared family environment. (N=21k, Sweden) https://twitter.com/fsnole1/status/917467253339250700 …
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Is this a relative measure? Otherwise, how does it square with large rises and falls in average crime rates?
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Cellphones/cheap security cams/Compstat/better policing/teen contraception/work programs/mass incarceration do a lot of the reduction...
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Where are you going with this? We shouldn't punish? We should sterilise criminals or tweak their kids' genes? Just curious and concerned...
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Either way, heritability is inherently relative, since it measures the effect of genes v environment on population *variance* in a trait.
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What have I got wrong in the above?
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Yes, I know that. It still means that if h2 = 42%, then the sum of environmental factors on variance in the population (inc error) = 58%.
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Yes, but pre-birth enviro effects are part of the 58%, ergo, upbringing cannot be more than, but can be less than 58%.
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Yes, this is true. If everyone had an identical upbringing (including exposure to social influences on crime, ofc), h2 would be 100%.
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I'd describe the distinction between shared & non-shared environment as a sensible & necessary elaboration of the theory,
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