across the country to obtain di erences-in-di erences estimates of its impact on crime rates. We also use unique counts of … the detainees from each county and month to estimate the elasticity of crime with respect to con ned immigrants. e re …- sults show that the Secure Communities program has had no observable e ect on the overall crime rate. Paper available at …

distinctive of a period in which crime and immigration have been increasingly politicised. In immigration enforcement, criminal …

Immigration enforcement has ambiguous implications for the crime rate of undocumented immigrants. On the one hand …, expulsions reduce the pool of immigrants at risk of committing crimes, on the other they lower the opportunity cost of crime for … those who are not expelled. We estimate the effect of expulsions on the crime rate of undocumented immigrants in Italy …