Immigrants and Natives: Comparative Economic Performance in the U.S., 1850-60 and 1965-80
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Immigrants who arrived in the U.S. before the Civil War were less likely to reside in locations with high immigrant concentrations as their time in the U.S. increased. This is contrary to the experience of recent immigrants who show no decrease in concentration after arrival. The reduced isolation
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美国国家经济研究局创建时间：
1996-09-01
