Agglomeration economies affect urban economic outcomes. We analyze variation in sports team productivity and localization of teams across divisions and cities in Campeonato Paulista an annual football competition in Sao Paulo state, Brazil, exploiting plausibly exogenous variation in...

Emerging research documents the impact of poor air quality on employee performance in a number of settings, including sport. Unlike other settings, sports teams have limited ability to influence previously scheduled games, making air quality exogenous to unobservable factors affecting game...