@hbdchick @intelligenceres @JamesPsychol Isn't that in part b/c upwardly mobile heiresses often only child's, thus from infertile families?
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@waynecolvin dunno. never heard that before. -
@hbdchick R. A. Fisher: The Social Selection of Fertility (1930) http://racehist.blogspot.de/2013/06/r-fisher-social-selection-of-fertility.html … -
@waynecolvin oh, thanks! - End of conversation
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