Evidence of a causal link between health outcomes, insurance coverage, and a policy to expand access: experimental data from children in the Philippines
利用菲律宾随机政策实验数据，通过双重差分模型估计了针对贫困儿童的健康保险干预使消瘦概率降低9-12个百分点、感染概率降低4-9个百分点，且效果在出院后数周才显现。
In this paper, we present evidence on the health effects of a health insurance intervention targeted to poor children using data from a randomized policy experiment known as the Quality Improvement Demonstration Study. Among study participants, using a difference-in-difference regression model, we estimated a 9-12 and 4-9 percentage point reduction in the likelihood of wasting and having an infection, respectively, as measured by a common biomarker C-reactive Protein. Interestingly, these benefits were not apparent at the time of discharge; the beneficial health effects were manifest several weeks after release from the hospital.