The frictions that restrict migration are among the largest sources of inefficiency in the global economy. The first step in designing policies to address these frictions is to understand the funda...

中文翻译：

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社交网络与迁移

限制移民的摩擦是全球经济效率低下的最大原因之一。设计解决这些摩擦的政策的第一步是了解基本原则。