ABORTION AND CRIME: UNWANTED CHILDREN AND OUT-OF-WEDLOCK BIRTHS
研究了堕胎合法化对犯罪率的影响，发现其可能使谋杀率上升0.5%至7%，并指出此前研究未直接关联犯罪群体与堕胎合法化时间的问题。
Abortion may prevent the birth of "unwanted" children, who would have relatively small investments in human capital and a higher probability of crime.On the other hand, some research suggests that legalizing abortion increases out-of-wedlock births and single parent families, which implies the opposite impact on investments in human capital and thus crime.The question is: what is the net impact?We find evidence that legalizing abortion increased murder rates by around about 0.5 to 7 percent.Previous estimates are shown to suffer from not directly linking the cohorts who are committing crime with whether they had been born before or after abortion was legal.