RT Journal Article SR Electronic T1 Immigration Enforcement and Origin Country Labor Markets JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 0525-14310R2 DO 10.3368/jhr.0525-14310R2 A1 Pearson, Thomas YR 2026 UL http://jhr.uwpress.org/content/early/2026/07/02/jhr.0525-14310R2.abstract AB This paper studies how increased immigration enforcement in the destination country impacts labor markets in the origin country. Using variation in Mexican migrant networks and Secure Communities (SC), a policy which expanded local immigration enforcement, I show that the deportation of Mexican migrants from the U.S. increases return migration to Mexico and decreases monthly earnings for workers there. The negative earnings effects are largest for workers most similar to return migrants in terms of their demographics, occupations, and employment types, and are consistent with increased labor market competition.