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Prior research has shown that immigrants are more likely than natives to become entrepreneurs, and that entrepreneurs are disproportionately drawn from the extremes of the ability distribution. Using a large panel of US residents with bachelors' degrees in scientific fields, we ask whether higher rates of entrepreneurship among immigrants can be explained by their position on the ability spectrum and establish four new facts about science-based and immigrant entrepreneurship. First, in this sample, an immigrant entrepreneurship premium exists only in science-based entrepreneurship. Second, this premium persists after controlling for ability (measured by paid employment wage residuals.) Third, a Ushaped relationship between ability and entrepreneurship exists only in non-science entrepreneurship; for science entrepreneurship, the relationship is increasing. Finally, the immigrant premium in science entrepreneurship is largest among immigrants with non-US degrees and those from non-English-speaking or culturally dissimilar countries. Stated preferences for selfemployment do not explain the immigrant premium. The results suggest that immigrants may on average have higher levels of unobservable skills related to entrepreneurship.

We examine the impact of assisted reproductive technology on women's choice to pursue professional careers. We hypothesize that the availability of assisted reproductive technology increases the expected benefits of a professional degree by allowing women to delay childbearing in their 20s and 30s while establishing their careers, thereby reaping greater financial benefit from human capital investment. State-level timing differences in the enactment of laws which mandated infertility treatment coverage in employer-sponsored health plans allow us to exploit state, year, and cohort variation in women's ages at the time the laws are passed. These insurance mandates dramatically increase access to assisted reproductive technology. Using a triple difference strategy, we find that a mandate to cover assisted reproductive technology does increase the probability that a woman chooses to invest in a professional degree and to work in a professional career.

We study the association between the gender of the highest-ranking manager (the CEO) and gender differences in employees' outcomes using detailed linked employer-employee data from the formal sector in Cameroon, Côte d'Ivoire, and Senegal. Our empirical strategy relies on the inclusion of firm fixed effects and workers' characteristics. Our results point toward a negative correlation between female CEO and the relative wages and job satisfaction of female employees. However, female employees working under a female CEO who owns the firm are not paid less than their male colleagues.

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