Exports, immigration and human capital in US states
用贝叶斯方法估计随机前沿模型，衡量美国各州出口和移民对生产率的影响，发现两者均有正向作用，且移民与当地已有的人力资本互动能提升效率。
Using a Bayesian approach we estimate a stochastic frontier model to measure the productivity effects of state-level exports and immigration to each of the 50 US states. The results show that state productivity is affected positively by both state exports and immigrants arriving with embodied human capital. The efficiency model also reveals that the interaction of incoming immigrants with previously accumulated human capital in the host state improves state efficiency.