We propose a simple theoretical model of supervised learning that is potentially useful to interpret a number of empirical phenomena. The model captures a basic tradeoff between sheltering the child from the consequences of his mistakes, and allowing him to learn from experience. We characterize...

We study how two distinct dimensions of peer ethnic diversity (ethnic fractionalization and ethnic polarization) affect occupational choice. Using longitudinal administrative data and leveraging variation in ethnic composition across cohorts within schools, we find evidence for two opposing...