This paper studies the aggregate economic effects of diversity policies such as affirmative action in college admission. If agents are constrained in the side payments they can make, the free market allocation displays excessive segregation relative to the first-best. Affirmative action policies...

We investigate the long-run consequences of historic, climatic temperatures (1730-2000) for the modern cross-country income distribution. Using a newly constructed dataset of climatic temperatures stretching over three centuries (18th, 19th, and 20th), we estimate a robust and significant...