THE EFFECT OF JOINT CUSTODY ON FAMILY OUTCOMES
利用美国各州不同时间引入共同监护法的改革，研究发现该法律提高了结婚率和总体生育率（尤其是婚内生育），增加了老年夫妇的离婚率，降低了女性劳动参与率，并减少了男性自杀率和家庭暴力，表明共同监护增强了男性在婚姻中的议价能力。
Since the 1970s almost all US states have introduced a form of joint custody after divorce. I analyze the causal effect of these custody law reforms on different family outcomes. My identification strategy exploits the different timing of reforms across the US states. Estimations based on state panel data suggest that the introduction of joint custody led to an increase in marriage rates, an increase in overall fertility (including a shift from nonmarital to marital fertility), and an increase in divorce rates for older couples. Accordingly, female labor market participation decreased. Further, male suicide rates and domestic violence fell in treated states. The empirical evidence is consistent with the hypothesis that joint custody increased the relative bargaining power of men within marriage.