Migrants and Firms: Evidence from China
利用2000-2006年中国制造业企业数据，研究农村向城市移民如何影响城市生产，发现移民增加导致生产更劳动密集、生产率下降，并分析了技术变革和产品种类调整。
How does rural-urban migration shape urban production in developing countries? We use longitudinal data on Chinese manufacturing firms between 2000 and 2006, and exploit exogenous variation in rural-urban migration induced by agricultural income shocks for identification. We find that, when immigration increases, manufacturing production becomes more labor intensive and productivity declines. We investigate the reorganization of production using patent applications and product information. We show that rural-urban migration induces both labor-oriented technological change and the adoption of labor intensive product varieties.