The Contingent Valuation Method in Health Care: An Economic Evaluation of Alzheimer's Disease
The present work focuses on the choice of the elicitation technique within a contingent valuation (CV) framework. We simultaneously apply three different elicitation techniques to elicit willingness-to-pay (WTP) values for different programs against Alzheimer's disease. The WTP values are elicited by using the dichotomous choice approach, which is the standard procedure. However, giving respondents only a yes/no response alternative seems to result in overestimated WTP values. Therefore, we additionally apply the dissonance-minimizing format which screens respondents for their preferences and thus avoids possible yea-saying and protest answers against the payment vehicle. In addition, a modified version of the payment card is used, allowing respondents to express a level of voting certainty and to make less of a commitment. With our findings we modify existing guidelines on how to execute a CV study. We show that the Swiss population favors highly a program which improves the situation of informal caregivers and that a well-designed CV method is a suitable instrument for helping decision makers in the health care sector.
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