Using Willingness To Pay To Value Close Substitutes: Carrier Screening for Cystic Fibrosis Revisited
研究提出一种新方法测量支付意愿，用于区分两种囊性纤维化携带者筛查方案，发现新方法更有效，且开放式支付意愿问题不具效度。
Evidence suggests that previous uses of willingness to pay (WTP) to value close substitutes may have failed to discriminate between the alternatives being evaluated. This paper reports on the application of a new technique for measuring WTP in such contexts. The alternatives evaluated are two methods of screening for cystic fibrosis carrier status. The results suggest that the new method is more discriminating. Furthermore, the paper provides evidence, from reasons for respondents' WTP valuations and regression analyses, that the use of open-ended WTP questions is not valid. This is in line with the recommendations of a recent, influential, report on the use WTP techniques. © 1997 by John Wiley & Sons, Ltd.