Validity and Reliability of Willingness-to-Pay Estimates: Evidence from Two Overlapping Discrete-Choice Experiments
- Presenter:
Chair: David Meltzer; Discussant: William Cartwright Wed June 7, 2006 8:00-9:30 Room 309
Discrete-choice experiments, while becoming increasingly popular, have rarely been tested for validity and reliability. This contribution purports to provide some evidence of a rather uniqe type. Two surveys designed to measure willingess-to-accept (WTA) for reform options in Swiss health care and health insurance are used to provide independent information w th regard to two elements of reform. The issue to be addressed is whether WTA values converge although the three overlapping attributes (a more restrictive drug benefit, delayed access to medical innovation, and a change in the monthly insurance premium) are imbedded in widely differing choice sets. Experimentt A contains rather radical health system reform options. while experiment B concentrates on more familiar elements such as copayments and the benefit catalogue. EWile mean WTA values differ between experiments, the tend to vary in similar ways, suggesting at least theoretical validity and reliability.
