Here's some regression coefficients...
If we're at an evolutionary equilibrium, how can these not all be zero?
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why not? multiple "types" can exist in an evolutionarily stable equilibrum. See the classic Hawk-Dove game: the mixed Nash is the ESS.
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Sure, but if we are at an equilibrium, then shouldn't all types reproduce equally well on average? These strong correlations seem to suggest that's not happening.
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Here we're assuming independence of personality traits: it could be that extraversion is correlated with openness, for instance, and they balance out on net to 0.
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That's an interesting point. Rushton and Irwing do a meta review and arrive at these correlations.
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I decided to just check this. From the correlations we can actually generate z-scores and thus simulate people and calculate their expected # of grandkids. Including the correlations does indeed reduce the spread a bit...
