Returns to Labour Mobility
指出劳动力流动的回报在宏观劳动模型中常被忽视，通过对比劳动经济学和产业组织两种校准方法，发现基于产业组织的方法得出的回报更稳健。
Abstract Returns to labour mobility have too often escaped the attention they deserve as conduits of important forces in macro-labour models. These returns are shaped by calibrations of productivity processes that use theoretical perspectives and data sources from (i) labour economics and (ii) industrial organisation. By investigating earlier prominent studies, we conclude that the focus on firm size dynamics and shocks intermediated through neo-classical production functions in (ii) yields large returns to labour mobility that are robust to parameter perturbations. In contrast, the reliance on statistics in labour economics to calibrate per-worker productivity processes in (i) can give rise to fragilities in the sense that parameter perturbations that generate similar targeted statistics can have very different implications for returns to labour mobility.