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Validity and Reliability of Willingness-to-Pay Estimates: Evidence from Two Overlapping Discrete-Choice Experiments

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Author Info

  • Harry Telser

    ()
    (Socioeconomic Institute, University of Zurich)

  • Karolin Becker

    ()
    (Plaut Economics, Olten)

  • Peter Zweifel

    ()
    (Socioeconomic Institute, University of Zurich)

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    Abstract

    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 unique type. Two surveys designed to measure willingness-to-accept (WTA) for reform op-tions in Swiss health care and health insurance are used to provide independent information with 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, a delayed access to medical innovation, and a change in the monthly insurance premium) are embedded in widely differing choice sets. Experiment A contains rather radical health system reform options, while experiment B concentrates on more familiar elements such as copayment and the benefit catalogue. While mean WTA values differ between experiments, they tend to vary in similar ways, suggesting at least theoretical validity and reliability.

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    File URL: http://www.soi.uzh.ch/research/wp/2004/wp0412.pdf
    File Function: Revised version, 2008
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    Bibliographic Info

    Paper provided by Socioeconomic Institute - University of Zurich in its series SOI - Working Papers with number 0412.

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    Length: 27 pages
    Date of creation: Sep 2004
    Date of revision: Mar 2008
    Publication status: published in The Patient 1(4), 2008, pp. 283-298
    Handle: RePEc:soz:wpaper:0412

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    Keywords: willingness-to-pay; discrete choice experiments; validity; reliability; framing effects;

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    References

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    1. Thomas Borek & Stefan Buehler & Armin Schmutzler, 2002. "Weddings with Uncertain Prospects – Mergers under Asymmetric Information," SOI - Working Papers 0213, Socioeconomic Institute - University of Zurich, revised Feb 2004.
    2. Yves Schneider & Peter Zweifel, 2002. "How Much Internalization of Nuclear Risk Through Liability Insurance?," SOI - Working Papers 0211, Socioeconomic Institute - University of Zurich.
    3. Stefan Buehler & Armin Schmutzler & Men-Andri Benz, 2002. "Infrastructure Quality in Deregulated Industries: Is there an Underinvestment Problem?," SOI - Working Papers 0209, Socioeconomic Institute - University of Zurich.
    4. Bühler, Stefan & Schmutzler, Armin, 2003. "Who Integrates?," CEPR Discussion Papers 4066, C.E.P.R. Discussion Papers.
    5. Andreas Polk & Armin Schmutzler, 2003. "Lobbying against Environmental Regulation vs. Lobbying for Loopholes," SOI - Working Papers 0301, Socioeconomic Institute - University of Zurich.
    6. Rainer Winkelmann, 2002. "Subjektive Daten in der empirischen Wirtschaftsforschung: Probleme und Perspektiven," SOI - Working Papers 0207, Socioeconomic Institute - University of Zurich, revised Jul 2002.
    7. Thomas Borek & Stefan Buehler & Armin Schmutzler, 2004. "Mergers under Asymmetric Information – Is there a Lemons Problem?," SOI - Working Papers 0408, Socioeconomic Institute - University of Zurich.
    8. Andreas Polk, 2002. "Multilateral Agreement On Investments (MAI) - A Critical Assessment From an Industrial Economics Point of View," SOI - Working Papers 0201, Socioeconomic Institute - University of Zurich, revised Feb 2002.
    9. Daniel Halbheer & Sarah Niggli & Armin Schmutzler, 2003. "What does it take to sell Environmental Policy? An empirical Analysis of Referendum Data," SOI - Working Papers 0304, Socioeconomic Institute - University of Zurich, revised Apr 2005.
    10. BŸhler, Stefan & Zava Aydemir, 2003. "Estimating Vertical Foreclosure in U.S. Gasoline Supply," Royal Economic Society Annual Conference 2003 33, Royal Economic Society.
    11. Ryan, Mandy & Wordsworth, Sarah, 2000. "Sensitivity of Willingness to Pay Estimates to the Level of Attributes in Discrete Choice Experiments," Scottish Journal of Political Economy, Scottish Economic Society, vol. 47(5), pages 504-24, November.
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    Cited by:
    1. Charles Cunningham & Ken Deal & Yvonne Chen, 2010. "Adaptive Choice-Based Conjoint Analysis," The Patient: Patient-Centered Outcomes Research, Springer, vol. 3(4), pages 257-273, December.
    2. Axel Mühlbacher & Matthias Nübling, 2010. "Analysis of Patients’ Preferences," The Patient: Patient-Centered Outcomes Research, Springer, vol. 3(4), pages 285-294, December.

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