Leah Boustan Publications

Using millions of historical census records and modern birth certificates, we document that immigrants assimilated into US society at similar rates in the past and present. We measure cultural assimilation as immigrants giving their children less foreign names after spending more time in the United States, and show that immigrants erase about one-half of the naming gap with natives after 20 years both historically and today. Immigrants from poorer countries choose more foreign names upon first arrival in both periods but are among the fastest to shift toward native-sounding names. We find substantial cultural assimilation for immigrants of all education levels.

From 1940 to 1970, nearly four million black migrants left the American rural South to settle in the industrial cities of the North and West. Competition in the Promised Land provides a comprehensive account of the long-lasting effects of the influx of black workers on labor markets and urban space in receiving areas. Traditionally, the Great Black Migration has been lauded as a path to general black economic progress. Leah Boustan challenges this view, arguing instead that the migration produced winners and losers within the black community. Boustan shows that migrants themselves gained tremendously, more than doubling their earnings by moving North. But these new arrivals competed with existing black workers, limiting black–white wage convergence in Northern labor markets and slowing black economic growth. Furthermore, many white households responded to the black migration by relocating to the suburbs. White flight was motivated not only by neighborhood racial change but also by the desire on the part of white residents to avoid participating in the local public services and fiscal obligations of increasingly diverse cities. Employing historical census data and state-of-the-art econometric methods, Competition in the Promised Land revises our understanding of the Great Black Migration and its role in the transformation of American society.

During the Age of Mass Migration (1850–1913), the United States maintained an open border, absorbing 30 million European immigrants. Prior cross-sectional work finds that immigrants initially held lower-paid occupations than natives but converged over time. In newly assembled panel data, we show that, in fact, the average immigrant did not face a substantial occupation-based earnings penalty upon first arrival and experienced occupational advancement at the same rate as natives. Cross-sectional patterns are driven by biases from declining arrival cohort skill level and departures of negatively selected return migrants. We show that assimilation patterns vary substantially across sending countries and persist in the second generation.

During the age of mass migration (1850-1913), one of the largest migration episodes in history, the United States maintained a nearly open border, allowing the study of migrant decisions unhindered by entry restrictions. We estimate the return to migration while accounting for migrant selection by comparing Norway-to-US migrants with their brothers who stayed in Norway in the late nineteenth century. We also compare fathers of migrants and nonmigrants by wealth and occupation. We find that the return to migration was relatively low (70 percent) and that migrants from urban areas were negatively selected from the sending population.

Residential segregation by jurisdiction generates disparities in public services and education. The distinctive American pattern—in which blacks live in cities and whites in suburbs—was enhanced by a large black migration from the rural South. I show that whites responded to this black influx by leaving cities and rule out an indirect effect on housing prices as a sole cause. I instrument for changes in black population by using local economic conditions to predict black migration from southern states and assigning predicted flows to northern cities according to established settlement patterns. The best causal estimates imply that each black arrival led to 2.7 white departures.