TEENAGE RISKY BEHAVIOR AND PARENTAL SUPERVISION: THE UNINTENDED CONSEQUENCES OF MULTIPLE SHIFTS SCHOOL SYSTEMS
利用布宜诺斯艾利斯市高中生随机分配到日班和夜班的实验，发现夜校女生更早开始性行为且堕胎概率更高，机制是缺乏家长监管。
We study the relationship between attending high school at night and the probability of engaging in risky behavior, such as having unsafe sex or consuming substances. To address potential endogeneity concerns we take advantage of a random assignment of high school students to daytime and night shifts in the city of Buenos Aires. Using an original survey on students attending their last year of high school, we find that girls attending high school in the evening start having sex at an earlier age and present a higher probability of getting an abortion. We find no significant differences for substance use. Our experimental approach suggests that the link between high school shift and risky behavior is causal. Results hold when we use an alternative sample of alumni. Finally, we report evidence that the lack of parental supervision is the mechanism underlying our results.