How much does your neighbor impact your test scores and career? In this paper, we examine how an observable characteristic of same-age neighbors - their gender - affects a variety of high school and university outcomes. We exploit randomness in the gender composition of local cohorts at birth...

Recidivism rates are a growing concern due to the high cost of imprisonment and the high rate of ex-prisoners returning back to prison. One policy-relevant and potentially important determinant of recidivism is the composition of peer inmates. In this paper, we study the role of peer effects...