Peers play an essential role in cognitive and non-cognitive skills formation. Ordinal rank may also change incentives and environment, impacting students’ efforts. Using two rich administrative data sets and a rule of admission at one top university in Brazil that split students in two...

Pollution is a common byproduct of economic activity. Although policymakers should account for both the benefits and the negative externalities of polluting activities, it is difficult to identify those who are harmed and those who benefit from them. To overcome this challenge, our paper uses a...