Do Migrants Transfer Productive Knowledge Back to Their Origin Countries?
利用经济复杂性指数和20个OECD国家的移民数据，发现国际移民是技术传播的重要渠道，侨民通过连接高技术与低技术国家促进新技术采用，尤其当移民来自技术先进目的地且移民率较高时。
This paper analyses whether international migrants contribute to increasing technological advances in developing countries by inducing a transfer of productive knowledge from developed countries back to migrants’ home countries. Using the Economic Complexity Index as a proxy for the amount of productive knowledge embedded in each countries and bilateral migrant stocks of 20 OECD destination countries, we show that international migration is a strong channel of technological transmission. Diasporas foster the local adoption of new technologies by connecting high technology countries with low ones, reducing the uncertainty surrounding their profitability. Our empirical results support the hypothesis that technological transfers are more likely to occur out of more technologically advanced destinations and when emigration rates are particularly high.