Income Disparity, Inequity Aversion and the Design of the Healthcare System
使用事后社会福利函数评估不同医疗体系，发现允许购买补充保险的公共医疗体系总是优于纯私人保险，且不劣于纯公共医疗。
Abstract An ex post social welfare function is used to evaluate alternative healthcare systems. If a society is averse to inequality and there is some income disparity, social welfare under private healthcare insurance is sometimes higher and sometimes lower than social welfare under public healthcare. However, a third system—public healthcare with the option to purchase supplemental healthcare insurance—is always socially preferred to private healthcare insurance. Moreover, it is either socially preferred to public healthcare or equivalent to it.