The impact of return migration on employment and wages in Mexican cities
研究了从美国返回墨西哥的移民如何影响当地劳动力市场：与回流移民同职业的工人工资下降，其他职业工人工资上升，但影响是暂时的；回流移民会永久改变接收城市的产业结构。
How does return migration from the US to Mexico affect local workers? Return migrants increase the local labor supply, potentially hurting local workers. However, having been exposed to a more advanced U.S. economy, they may also carry human capital that benefits non-migrants. Using an instrument based on involuntary return migration, we find that, whereas workers who share returnees’ occupations experience a fall in wages, workers in other occupations see their wages rise. These effects are, however, transitory and restricted to the city-industry receiving the returnees. In contrast, returnees permanently alter a city’s long-run industrial composition, by raising employment levels in the local industries that hire them.