We examine the educational spillover effects of migrant students on local students' academic achievement in public … migrant students across classes within schools. We find that the proportion of migrant students in each class has a small, and … positive, effect on local students' test scores in Chinese, but has no significant effect on math and English test scores. We …

and years. I study a mandatory freshmen week for first-year undergraduates and exploit the random assignment of students ….e. very high or low levels of average peer ability in a group harm students' grades. These effects are most pronounced for low …-ability students. …

achievement. We exploit random assignment of students to university sections and find that students perform better in the presence … of more persistent peers and more risk-averse peers. In particular, low-persistence students benefit from highly …-persistent peers without devoting additional efforts to studying. However, highly-persistent students are not affected by the …