Although social pressure may affect the behavior of individuals, it is very hard to evaluate empirically. A soccer field is an attractive testing ground in the sense that both performance and social pressure by spectators are measurable. The drawback is that the number of spectators is an...

This paper studies how social pressure affects the behavior of soccer referees. We make use of an attractive source of exogenous variation in the number of spectators at matches. Due to recent hooligan violence, the Italian government has implemented a regulation that forces some soccer teams to...