健康对农民工劳动供给时间的影响

Impact of Health on Labor Supply of China's Floating Workers

利用世界银行的调查数据,使用赫克曼(Heckman)样本选择模型研究健康对中国农村居民外出打工劳动供给时间的影响,解决由于调查样本自选择而导致计量回归结果的有偏估计问题。研究结果表明:健康状况较差显著降低了农村居民外出打工的概率,在修正外出打工行为自我选择偏差的基础上,相对于健康状况较好的农民工,健康状况较差显著降低其18.90%的劳动供给时间;健康状况较差在一年内大约导致了外出打工的农民工21天工作时间的减少。因此,加大对农村居民的健康投资,不仅将改善其健康水平,还将发挥促进非农劳动供给时间的作用,从而可有效提高农民工的劳动收入。

This study examines the health effects on labor supply of China＇s floating workers.Heckman selection model is employed to correct the selection bias.Results from the survey data collected by World Bank show that poor self-reported health significantly reduced the probability of work hours of rural residents＇ off-farm participation and work days.The estimation suggests that the work days of floating workers with poor health is 21 days annually lower than the counterparts with good health.Therefore,the public investment in rural residents＇ health would not only improve their health,but also play a catalytic role in the off-farm labor supply.