. But the linear-in-means model masks considerable heterogeneity in the effects experienced by different types of students …. Using nonlinear models, one prevalent finding is larger peer effects in which high ability students benefit from the … presence of other high ability students. Studies that stratify students by race and ability often find that students are …

local students in Shanghai, where local students all go to public schools, but migrant students are endogenously selected … all student groups. We conduct policy experiments to examine the effect of transferring migrant students from private …

local students in Shanghai, where local students all go to public schools, but migrant students are endogenously selected … all student groups. We conduct policy experiments to examine the effect of transferring migrant students from private …

knowledge. We show that achievements of low ability students may be higher in a comprehensive school system, even if there are … no synergy effects from teaching different students together. This arises because the comprehensive school sets a … compromise standard which exceeds the standard from the low ability track. Moreover, if students with lower initial ability have …

local students in Shanghai, where local students all go to public schools, but migrant students are endogenously selected … all student groups. We conduct policy experiments to examine the effect of transferring migrant students from private …

assignment of students to classrooms and find positive peer effects on test scores. With rich data on nineteen potential …