Johannesson M
Centre for Health Economics, Stockholm School of Economics, Sweden.
Soc Sci Med. 1996 Feb;42(3):305-11. doi: 10.1016/0277-9536(95)00151-4.
It has been argued that the willingness to pay for health care services in contingent valuation studies should be assessed ex ante from an insurance perspective. It may however be easier to assess the willingness to pay among a group of patients in need of a specific treatment. This willingness to pay measure can be used to estimate the expected willingness to pay. This paper investigates the relationship between ex ante and expected willingness to pay. It is shown that expected willingness to pay is a lower bound for ex ante willingness to pay for a treatment that restores the individual to full health for an individual that is risk averse with respect to income. For a treatment that does not restore an individual to full health the expected willingness to pay is not necessarily a lower bound for the ex ante willingness to pay if the marginal utility of income increases with better health.
有人认为，在或有估值研究中，应从保险角度事前评估为医疗服务支付费用的意愿。然而，评估一组需要特定治疗的患者的支付意愿可能会更容易。这种支付意愿衡量方法可用于估计预期支付意愿。本文研究事前支付意愿与预期支付意愿之间的关系。结果表明，对于在收入方面规避风险的个体而言，预期支付意愿是事前为使个体恢复完全健康的治疗支付意愿的下限。对于无法使个体恢复完全健康的治疗，如果收入的边际效用随健康状况改善而增加，那么预期支付意愿不一定是事前支付意愿的下限。
