Guanghua School of Management, Peking University, China.
J Health Econ. 2012 Jan;31(1):1-14. doi: 10.1016/j.jhealeco.2011.11.001. Epub 2011 Dec 9.
Using the 2006 China Agricultural Census (CAC), we examine whether the introduction of the New Cooperative Medical System (NCMS) has affected child mortality, maternal mortality, and school enrollment of 6-16year olds. Our data cover 5.9 million people living in eight low-income rural counties, of which four adopted the NCMS by 2006 and four did not adopt it until 2007. Raw data suggest that enrolling in the NCMS is associated with better school enrollment and lower mortality of young children and pregnant women. However, using a difference-in-difference propensity score method, we find that most of the differences are driven by endogenous introduction and take-up of the NCMS, and our method overcomes classical propensity score matching's failure to address selection bias. While the NCMS does not affect child morality and maternal mortality, it does help improve the school enrollment of six-year-olds.
利用 2006 年中国农业普查(CAC)数据,我们检验了新型农村合作医疗制度(NCMS)的引入是否对 6-16 岁儿童的死亡率、产妇死亡率和入学率产生了影响。我们的数据涵盖了 590 万人,他们生活在 8 个低收入农村县,其中 4 个县在 2006 年采用了 NCMS,而另外 4 个县直到 2007 年才采用。原始数据表明,参加 NCMS 与更高的入学率以及降低幼儿和孕妇死亡率有关。然而,使用双重差分倾向得分匹配法,我们发现大多数差异是由 NCMS 的内生引入和参与所驱动的,并且我们的方法克服了经典倾向得分匹配法无法解决选择偏差的问题。虽然 NCMS 对儿童死亡率和产妇死亡率没有影响,但它确实有助于提高 6 岁儿童的入学率。