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Using data from the U.S. Census in conjunction with data from the Current Population Survey (1980–2009), I find little support for the opt-out revolution – highly educated women, relative to their less-educated counterparts, are exiting the labor force to care for their families at higher rates today than in earlier time periods – if one focuses solely on the decision to work a positive number of hours irrespective of marital status or race. If one, however, focuses on both the decision to work a positive number of hours and the decision to adjust annual hours of work (conditional on working), I find some evidence of the opt-out revolution, particularly among white college educated married women in male-dominated occupations.

This chapter estimates the impact of a transitory reduction in hours during physicians' early career on their long-term labor supply, using the work-hour regulations on medical residents as the source of exogenous variation. The results show that exposure to the regulations significantly decreases practicing physicians' labor supply by about 4 hours per week on average, with female physicians being more responsive to a given reduction in early career hours. Distributional results using a changes-in-changes model confirm that the regulations primarily affect the upper end of the work-hour distribution. To reveal potential mechanisms of these effects, this study finds that the reform increases the probabilities of marriage and having a child, as well as the total number of children, for female physicians. In contrast, it does not have a significant impact on marriage and fertility outcomes for male physicians. These findings provide a better understanding of physicians' hours of work in response to the reform over time and the role of gender with respect to labor supply behavior and family formation decisions.