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Disentangling WTP per QALY data: different analytical approaches, different answers

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  • Dorte Gyrd‐Hansen
  • Trine Kjær

Abstract

A large random sample of the Danish general population was asked to value health improvements by way of both the time trade‐off elicitation technique and willingness‐to‐pay (WTP) using contingent valuation methods. The data demonstrate a high degree of heterogeneity across respondents in their relative valuations on the two scales. This has implications for data analysis. We show that the estimates of WTP per QALY are highly sensitive to the analytical strategy. For both open‐ended and dichotomous choice data we demonstrate that choice of aggregated approach (ratios of means) or disaggregated approach (means of ratios) affects estimates markedly as does the interpretation of the constant term (which allows for disproportionality across the two scales) in the regression analyses. We propose that future research should focus on why some respondents are unwilling to trade on the time trade‐off scale, on how to interpret the constant value in the regression analyses, and on how best to capture the heterogeneity in preference structures when applying mixed multinomial logit. Copyright © 2011 John Wiley & Sons, Ltd.

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  • Dorte Gyrd‐Hansen & Trine Kjær, 2012. "Disentangling WTP per QALY data: different analytical approaches, different answers," Health Economics, John Wiley & Sons, Ltd., vol. 21(3), pages 222-237, March.
    • Handle: RePEc:wly:hlthec:v:21:y:2012:i:3:p:222-237
    DOI: 10.1002/hec.1709
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    1. Richard D. Smith, 2001. "The relative sensitivity of willingness‐to‐pay and time‐trade‐off to changes in health status: an empirical investigation," Health Economics, John Wiley & Sons, Ltd., vol. 10(6), pages 487-497, September.
    2. Pinto-Prades, Jose Luis & Loomes, Graham & Brey, Raul, 2009. "Trying to estimate a monetary value for the QALY," Journal of Health Economics, Elsevier, vol. 28(3), pages 553-562, May.
    3. Kanninen Barbara J., 1995. "Bias in Discrete Response Contingent Valuation," Journal of Environmental Economics and Management, Elsevier, vol. 28(1), pages 114-125, January.
    4. Hess, Stephane, 2007. "Posterior analysis of random taste coefficients in air travel behaviour modelling," Journal of Air Transport Management, Elsevier, vol. 13(4), pages 203-212.
    5. Joseph Cooper & John Loomis, 1992. "Sensitivity of Willingness-to-Pay Estimates to Bid Design in Dichotomous Choice Contingent Valuation Models," Land Economics, University of Wisconsin Press, vol. 68(2), pages 211-224.
    6. Bleichrodt, Han & Quiggin, John, 1999. "Life-cycle preferences over consumption and health: when is cost-effectiveness analysis equivalent to cost-benefit analysis?," Journal of Health Economics, Elsevier, vol. 18(6), pages 681-708, December.
    7. Niklas Zethraeus, 1998. "Willingness to pay for hormone replacement therapy," Health Economics, John Wiley & Sons, Ltd., vol. 7(1), pages 31-38, February.
    8. Daniel McFadden & Kenneth Train, 2000. "Mixed MNL models for discrete response," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 15(5), pages 447-470.
    9. Train,Kenneth E., 2009. "Discrete Choice Methods with Simulation," Cambridge Books, Cambridge University Press, number 9780521747387.
    10. David Hensher & William Greene, 2003. "The Mixed Logit model: The state of practice," Transportation, Springer, vol. 30(2), pages 133-176, May.
    11. Joseph T. King Jr. & Joel Tsevat & Judith R. Lave & Mark S. Roberts, 2005. "Willingness to Pay for a Quality-Adjusted Life Year: Implications for Societal Health Care Resource Allocation," Medical Decision Making, , vol. 25(6), pages 667-677, November.
    12. Karen Blumenschein & Magnus Johannesson & Glenn C. Blomquist & Bengt Liljas & Richard M. O’Conor, 1998. "Experimental Results on Expressed Certainty and Hypothetical Bias in Contingent Valuation," Southern Economic Journal, John Wiley & Sons, vol. 65(1), pages 169-177, July.
    13. Fosgerau, Mogens, 2006. "Investigating the distribution of the value of travel time savings," Transportation Research Part B: Methodological, Elsevier, vol. 40(8), pages 688-707, September.
    14. Anna Alberini, 1995. "Testing Willingness-to-Pay Models of Discrete Choice Contingent Valuation Survey Data," Land Economics, University of Wisconsin Press, vol. 71(1), pages 83-95.
    15. Cam Donaldson & Stephen Birch & Amiram Gafni, 2002. "The distribution problem in economic evaluation: income and the valuation of costs and consequences of health care programmes," Health Economics, John Wiley & Sons, Ltd., vol. 11(1), pages 55-70, January.
    16. Kenneth E. Train, 1998. "Recreation Demand Models with Taste Differences over People," Land Economics, University of Wisconsin Press, vol. 74(2), pages 230-239.
    17. Champ, Patricia A. & Bishop, Richard C. & Brown, Thomas C. & McCollum, Daniel W., 1997. "Using Donation Mechanisms to Value Nonuse Benefits from Public Goods," Journal of Environmental Economics and Management, Elsevier, vol. 33(2), pages 151-162, June.
    18. Dolan, Paul & Edlin, Richard, 2002. "Is it really possible to build a bridge between cost-benefit analysis and cost-effectiveness analysis?," Journal of Health Economics, Elsevier, vol. 21(5), pages 827-843, September.
    19. Hanley, Nick & Adamowicz, Wiktor & Wright, Robert E., 2005. "Price vector effects in choice experiments: an empirical test," Resource and Energy Economics, Elsevier, vol. 27(3), pages 227-234, October.
    20. Louviere, Jordan J, 2001. "What If Consumer Experiments Impact Variances as Well as Means? Response Variability as a Behavioral Phenomenon," Journal of Consumer Research, Journal of Consumer Research Inc., vol. 28(3), pages 506-511, December.
    21. Bernie O'Brien & Jose Luis Viramontes, 1994. "Willingness to Pay," Medical Decision Making, , vol. 14(3), pages 289-297, August.
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    1. Khachapon Nimdet & Nathorn Chaiyakunapruk & Kittaya Vichansavakul & Surachat Ngorsuraches, 2015. "A Systematic Review of Studies Eliciting Willingness-to-Pay per Quality-Adjusted Life Year: Does It Justify CE Threshold?," PLOS ONE, Public Library of Science, vol. 10(4), pages 1-16, April.
    2. S. Olofsson & U.-G. Gerdtham & L. Hultkrantz & U. Persson, 2019. "Value of a QALY and VSI estimated with the chained approach," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 20(7), pages 1063-1077, September.
    3. S. Olofsson & U.-G. Gerdtham & L. Hultkrantz & U. Persson, 2018. "Measuring the end-of-life premium in cancer using individual ex ante willingness to pay," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 19(6), pages 807-820, July.
    4. Linda Ryen & Mikael Svensson, 2015. "The Willingness to Pay for a Quality Adjusted Life Year: A Review of the Empirical Literature," Health Economics, John Wiley & Sons, Ltd., vol. 24(10), pages 1289-1301, October.
    5. Afentoula G. Mavrodi & Vassilis H. Aletras, 2019. "Preliminary Results of a Healthcare Contingent Valuation Study in Greece," International Journal of Finance, Insurance and Risk Management, International Journal of Finance, Insurance and Risk Management, vol. 9(3-4), pages 3-16.
    6. Herrera-Araujo, Daniel & Hammitt, James K. & Rheinberger, Christoph M., 2020. "Theoretical bounds on the value of improved health," Journal of Health Economics, Elsevier, vol. 72(C).
    7. Mark Pennington & Rachel Baker & Werner Brouwer & Helen Mason & Dorte Gyrd Hansen & Angela Robinson & Cam Donaldson & the EuroVaQ Team, 2015. "Comparing WTP Values of Different Types of QALY Gain Elicited from the General Public," Health Economics, John Wiley & Sons, Ltd., vol. 24(3), pages 280-293, March.
    8. Laura Vallejo-Torres & Borja García-Lorenzo & Oliver Rivero-Arias & José Luis Pinto-Prades, 2020. "The societal monetary value of a QALY associated with EQ-5D-3L health gains," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 21(3), pages 363-379, April.
    9. Ana Bobinac & N. Job A. van Exel & Frans F. H. Rutten & Werner B. F. Brouwer, 2013. "Valuing Qaly Gains By Applying A Societal Perspective," Health Economics, John Wiley & Sons, Ltd., vol. 22(10), pages 1272-1281, October.
    10. Christian R. C. Kouakou & Thomas G. Poder, 2022. "Willingness to pay for a quality-adjusted life year: a systematic review with meta-regression," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 23(2), pages 277-299, March.
    11. Arthur E. Attema & Marieke Krol & Job Exel & Werner B. F. Brouwer, 2018. "New findings from the time trade-off for income approach to elicit willingness to pay for a quality adjusted life year," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 19(2), pages 277-291, March.
    12. Olofsson, Sara & Gerdtham , Ulf-G & Hultkrantz , Lars & Persson , Ulf, 2016. "Chained Approach vs Contingent Valuation for Estimating the Value of Risk Reduction," Working Papers 2016:34, Lund University, Department of Economics.
    13. Robinson, Angela & Gyrd-Hansen, Dorte & Bacon, Philomena & Baker, Rachel & Pennington, Mark & Donaldson, Cam, 2013. "Estimating a WTP-based value of a QALY: The ‘chained’ approach," Social Science & Medicine, Elsevier, vol. 92(C), pages 92-104.

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