Migration Networks and Location Decisions: Evidence from US Mass Migration
研究了美国历史迁移中，出生地迁移网络如何影响长期区位决策，发现非裔移民的迁移网络效应（平均1.9人）远强于白人移民（0.4人），且网络在连接非裔与就业机会中作用显著。
This paper studies how birth town migration networks affected long-run location decisions during historical US migration episodes. We develop a new method to estimate the strength of migration networks for each receiving and sending location. Our estimates imply that when one randomly chosen African American moved from a Southern birth town to a destination county, then 1.9 additional Black migrants made the same move on average. For White migrants from the Great Plains, the average is only 0.4. Networks were particularly important in connecting Black migrants with attractive employment opportunities and played a larger role in less costly moves.