Migration and U.S. Labor Market Effects of the Mexican Drug War

Abstract

We estimate the effect of the Mexican drug war on Mexico-to-U.S. migration and the resulting effects on population, employment, and wages in U.S. labor markets. Our empirical strategy compares U.S. counties differentially connected to Mexican municipalities through historical migration networks, using drug violence triggered by close municipal elections in 2007–2008 as a source of exogenous variation. Over the following decade, migrants fleeing the violence—the vast majority of whom are undocumented—cause native-born U.S. workers’ employment rates to increase and unemployment rates to fall, while wages do not change. Employment gains are largest for natives without a college degree. Employment effects fade after a decade