significant reductions in academic performance, particularly for the highest-performing students. This suggests that the negative …

assigned to peer groups of about 30 students with whom they are required to spend the majority of their time interacting. This …

goal of maximizing the academic performance of the lowest ability students. Our assignment algorithm uses peer effects … estimates from the observational data. We find a negative and significant treatment effect for the students we intended to help …. We show that within our "optimal" peer groups, students self-selected into bifurcated sub-groups with social dynamics …

linking administrative data on elementary school students to subsequent test scores, college attendance and completion, and … children from families linked to domestic violence, who were shown by Carrell and Hoekstra (2010, 2012) to disrupt … reduces earnings at age 26 by 3 to 4 percent. We estimate that differential exposure to children linked to domestic violence …