The relative sensitivity of willingness‐to‐pay and time‐trade‐off to changes in health status: an empirical investigation
通过50名受试者的调查，比较了支付意愿和时间权衡两种方法在衡量健康状况变化时的敏感性，发现支付意愿在区分健康维度及同一维度内不同健康水平方面更敏感。
This paper directly compares the relative sensitivity of time-trade-off (TTO) and willingness-to-pay (WTP) values obtained for various levels of change in health status. This was achieved by administering a TTO and WTP survey to a population of 50 subjects, assessing their valuation of various degrees of change in health status. It was found that, overall, WTP is more sensitive than TTO in distinguishing between different dimensions of health at the same nominal level of health status (only four WTP values not significantly different, compared with eight TTO values). In addition, WTP was also more sensitive to differences in quality of life between different levels of health within each dimension (all values significantly different from each other, with TTO yielding three insignificant relationships). These results tentatively suggest, therefore, that WTP seems to be a more sensitive measure of change in health status than TTO.