Teen Motherhood and Abortion Access
利用县级面板数据，研究发现近期堕胎限制（如诊所关闭、医疗补助资金限制）反而降低了青少年生育率，尤其是婚内生育率，这与以往禁止堕胎提高生育率的结论相反。
We investigate the effect of abortion access on teen birthrates using county-level panel data. Past research suggested that prohibiting abortion led to higher teen birthrates. Perhaps surprisingly, we find that more recent restrictions in abortion access, including the closing of abortion clinics and restrictions on Medicaid funding, had the opposite effect. Small declines in access were related to small declines among in-wedlock births; out-of-wedlock births were relatively unaffected. Both results are consistent with a simple model in which pregnancy is endogenous and women gain new information about the attractiveness of parenthood only after becoming pregnant.