In this paper, I use survey data from high school students in Texas to examine the magnitude of peer correlation in …

-group teaching component (classes or seminars) and on the role of attendance, number of students per class, peers, and tutors. The … empirical analysis is based on longitudinal administrative data from a major undergraduate program where students are allocated … amongst students, even in an institution that imposes rigorous admission criteria and so has little observable heterogeneity …

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. …