Does Border Enforcement Protect U.S. Workers From Illegal Immigration?

Gordon H. Hanson, Raymond Robertson and Antonio Spilimbergo

Chapter 6 in Not Just Neighbors:The Remarkable Economic Relationships in North America, 2026, pp 191-238 from World Scientific Publishing Co. Pte. Ltd.

Abstract: In this chapter, we examine the impact of enforcement of the U.S.–Mexico border on wages in U.S. and Mexican border regions. The U.S. Border Patrol polices U.S. boundaries, seeking to apprehend any undocumented entrants. It concentrates its efforts on the Mexican border. We examine labor markets in border areas of California, Texas, and Mexico. For each region, we have highfrequency data on wages and person-hours the U.S. Border Patrol spends policing the border. For a range of empirical specifications and definitions of regional labor markets, we find little impact of border enforcement on wages in U.S. border cities and a moderate negative impact of border enforcement on wages in Mexican border cities. These findings are consistent with two hypotheses: border enforcement has a minimal impact on illegal immigration, and illegal immigration from Mexico has a minimal impact on wages in U.S. border areas.

Keywords: US–Mexico Trade; Economic Integration; North American Competitiveness; USMCA / NAFTA; Global Supply Chains; Migration and Labor Markets; Wage Inequality; Cross-border Economics; Trade Policy and Development; Regional Economic Integration; US–Mexico Relations; Bilateral Trade Flows; Border Economy; Globalization and Inequality; Policy Responses to Trade Shocks (search for similar items in EconPapers)
JEL-codes: F13 F15 F22 J61 O24 P16 P52 (search for similar items in EconPapers)
Date: 2026
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