We estimate the influence of classmates ability characteristics on student achievement in exogenously formed student groups. The study uses the administrative data on undergraduate students in large selective university in Russia. The presence of high-ability classmates has positive effect on...

We estimate the correlation between student’s choice of specialization and the choices of the students connected by social ties. We use data on students of Economics department at one of the Russian universities and show that the choice is linked with the choice of friends as well as study...