Biosocial models of low-fertility societies

Low-fertility societies provide wide behavior choice. Where behavior choice is broad and opportunities are egalitarian, biological variables, reflecting natural differences in behavioral predispositions, explain increasing variation in behavior. Application of this principle to demographic research suggests that, increasingly, gendered behavior, fertility, contraception, abortion, nuptiality, occupational choice, and other behaviors of interest to demographers will be influenced by biological choice. But the influence of these processes will be invisible in research guided by traditional social science theories and executed with traditional social science research designs. Research designs are already available that are appropriate for incorporating biological data collection into survey research.