Vázquez, María Xosé; Araña, Jorge E.; León, Carmelo J. - In: Health Economics 15 (2006) 4, pp. 403-417
The estimation of economic benefits of health effects through direct methods, such as contingent valuation, presents the problem of preference imprecision. This paper deals with this problem by proposing an elicitation method that allows the subject to state an interval for willingness to pay,...