The Impact of Internal Migration on the Health of Rural Migrants: Evidence from Longitudinal Data in China
利用中国纵向数据，采用倾向得分匹配双重差分和工具变量法，发现内部迁移对农村迁移人口健康有显著负面影响，尤其对16-35岁年轻群体影响更大，机制涉及情绪状态和社会信任变化。
Previous studies investigating the health consequences of migration often face difficulties choosing a proper comparison group and tackling the problems of potential endogeneity and self-selection bias. Using propensity score matching difference-in-differences and an instrumental variable approach, this paper examines the impact of internal migration on the health of rural migrants in China. We find robust evidence of a significant negative effect of internal migration on rural migrants’ health. We also find significant heterogeneity in the impact across different age groups. Younger migrants aged between 16 and 35 are most likely to experience health decline following migration. In addition, we find that the key mechanisms through which internal migration affects the health of rural migrants are the changes in emotional state and social trust.