中文摘要
个人如何响应共同保险比例，对保险市场设计而言至关重要，但现有估计大多仅反映短期反应。我们利用一项独特的政策实验：该政策提高了部分老年人在70—74岁期间面临的共同保险比例，但在此之前或之后并未提高。较高的共同保险比例对医疗支出具有即时且持续的影响，其中相当大一部分影响在75岁以后仍然存在。我们未发现较高共同保险比例会影响健康状况的证据。这些结果表明，医疗保健利用取决于健康存量以外的动态因素，例如习惯。（JEL D12, G22, H51, I11, I12, I13, J14）
Abstract
How individuals respond to coinsurance rates is fundamental for insurance market design, but most existing estimates speak only to short-run responses. We exploit a unique policy experiment that increased the coinsurance rate some elderly individuals face when they are aged 70–74 but not before or after. Higher coinsurance rates have an immediate and persistent effect on health care expenditure, and a sizable share of this effect persists after age 75. We find no evidence that higher coinsurance rates affect health. These results suggest that health care utilization depends on dynamic factors other than health stock, such as habits. (JEL D12, G22, H51, I11, I12, I13, J14)