The impact of primary care physician density on perinatal health: Evidence from a natural experiment
利用挪威学生贷款减免政策作为自然实验，发现初级保健医生密度增加显著降低了胎儿死亡数并提高了出生体重，对围产期健康有积极影响。
We examined the impact of primary care physician density on perinatal health outcomes in Norway. From 1992 and onwards, primary care physicians who chose to work in selected remote municipalities were given an annual reduction in their student loan. This reduction, combined with increased supply of physicians, led to an increase in the density of primary care physicians in these selected municipalities. Our register-based population study showed that this increase in physician density significantly improved perinatal health in terms of fewer fetal deaths and increased birth weight. The richness of the data allowed us to perform several robustness tests.