Berthelon, Matias; Kruger, Diana; Vienne, Veronica - 2016
. In a setting where families choose schools, we identify the causal effect of longer schedules with instrumental variables …, using the local availability of full-day schools as an instrument. We find that lower-income families are more likely to … choose full-day schools, and after controlling for selection, longer school schedules lead to an increase of 0.14 standard …