Knowledge that Transforms

In October 2007, France introduced an exemption on the income tax and social security contributions that applied to wages received for hours worked overtime. The goal of the policy was to increase the number of hours worked. This article shows that this reform has had no significant impact on hours worked. Conversely, it has had a positive impact on the overtime hours declared by highly qualified wage earners, who have opportunities to manipulate the overtime hours they declare in order to optimize their tax situation since the hours they work are difficult to verify.

This paper provides among the first rigorous estimates of the labor-market returns to community college certificates and diplomas, as well as estimating the returns to the more commonly-studied associate's degrees. Using administrative data from Kentucky, we estimate panel-data models that control for differences among students in pre-college earnings and educational aspirations. Associate's degrees and diplomas have quarterly earnings returns of nearly $2,400 for women and $1,500 for men, compared with much smaller returns for certificates. There is substantial heterogeneity in returns across fields of study. Degrees, diplomas, and - for women - certificates correspond with higher levels of employment.

We study the effectiveness of magnet programs in an urban district that ration excess demand by admission lotteries. Differential attrition arises since students who lose the lottery are more likely to pursue options outside the school district than students who win the lottery. When students leave the district, important outcome variables are often not observed. The treatment effects are not point-identified. We exploit known quantiles of the outcome distribution to construct informative bounds on treatment effects. We find that magnet programs improve behavioral outcomes but have no significant effect on achievement.

This article investigates the pricing distortions that arise from the use of a common nonlinear incentive scheme at a leading enterprise software vendor. The empirical results demonstrate that salespeople are adept at gaming the timing of deal closure to take advantage of the vendor’s accelerating commission scheme. Specifically, salespeople agree to significantly lower pricing in quarters in which they have a financial incentive to close a deal, resulting in mispricing that costs the vendor 6%–8% of revenue. Robustness checks demonstrate that price discrimination by the vendor does not explain the identified effects.

This article examines whether gay and lesbian workers sort into tolerant occupations. With information on sexual orientation, prejudice, and occupational choice taken from Australian Twin Registers, we find that gays and lesbians shy away from prejudiced occupations. We show that our segregation results are largely driven by those gay and lesbian workers with disclosed identities and are robust to the inclusion of unobserved factors that are inherited and observed factors that strongly correlate with productive skills and vocational preferences. Our segregation estimates are consistent with prejudice-based theories of employer and employee discrimination against gay and lesbian workers.

This article analyzes the impact of five major expansions in maternity leave coverage in Germany on mothers’ labor market outcomes after childbirth. To identify the causal impact of the reforms, we use a difference-in-difference design that compares labor market outcomes of mothers who give birth shortly before and shortly after a change in maternity leave legislation in years of policy changes and years when no changes have taken place. Each expansion in leave coverage reduced mothers’ postbirth employment rates in the short run. The longer-run effects of the expansions on mothers’ postbirth labor market outcomes are, however, small.

The allocation of children’s time among different activities may be important for cognitive and noncognitive development. Here, we exploit time use diaries from the Longitudinal Study of Australian Children to study the effects of time allocation. By doing so, we characterize the trade-off between different activities to which a child is exposed. On the one hand, our results suggest that time spent in educational activities, particularly with parents, is the most productive input for cognitive skill development. On the other hand, noncognitive skills appear insensitive to alternative time allocations. Instead, they are greatly affected by the mother’s parenting style.