I wonder how much differing teenage pregnancy rates reflect different biological Age at First Reproduction https://www.ppin.org/education/documents/adolecent_preg_fact_sheet_06.pdf …
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http://en.wikipedia.org/wiki/Prevalence_of_teenage_pregnancy#Birth_and_abortion_rates.2C_1996 … plus obviously they're lower on the cool side of the Hajnal line
@hbdchick -
Some of the evidence it's hard biological rather than cultural http://www.pnas.org/content/early/2011/09/28/1104210108 …
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@sarahdoingthing Selection (pioneer colonization) plus huge amount of sorting. -
@JayMan471 Yep, totally - sudden explosion of population under selection for lower AFR
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@AliceTeller age at first reproduction, sorry! - 1 more reply
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@sarahdoingthing remember whites in the new world are self-sorted groups. they typically have unique average characteristics. (^_^)Thanks. Twitter will use this to make your timeline better. UndoUndo
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