IDEAS home Printed from https://ideas.repec.org/a/wly/hlthec/v21y2012i3p222-237.html
   My bibliography  Save this article

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

Author

Listed:
  • 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.

Suggested Citation

  • 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
    as

    Download full text from publisher

    File URL: https://doi.org/10.1002/hec.1709
    Download Restriction: no
    File URL: https://libkey.io/10.1002/hec.1709?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    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. 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.
    4. 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.
    5. 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.
    6. David Hensher & William Greene, 2003. "The Mixed Logit model: The state of practice," Transportation, Springer, vol. 30(2), pages 133-176, May.
    7. 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.
    8. 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.
    9. Train,Kenneth E., 2009. "Discrete Choice Methods with Simulation," Cambridge Books, Cambridge University Press, number 9780521766555.
    10. 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.
    11. Kenneth E. Train, 1998. "Recreation Demand Models with Taste Differences over People," Land Economics, University of Wisconsin Press, vol. 74(2), pages 230-239.
    12. 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.
    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. 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.
    15. 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.
    16. Bernie O'Brien & Jose Luis Viramontes, 1994. "Willingness to Pay," Medical Decision Making, , vol. 14(3), pages 289-297, August.
    17. Kanninen Barbara J., 1995. "Bias in Discrete Response Contingent Valuation," Journal of Environmental Economics and Management, Elsevier, vol. 28(1), pages 114-125, January.
    18. 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.
    19. Niklas Zethraeus, 1998. "Willingness to pay for hormone replacement therapy," Health Economics, John Wiley & Sons, Ltd., vol. 7(1), pages 31-38, February.
    20. 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.
    21. 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.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    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.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Robert J. Johnston & Kevin J. Boyle & Wiktor (Vic) Adamowicz & Jeff Bennett & Roy Brouwer & Trudy Ann Cameron & W. Michael Hanemann & Nick Hanley & Mandy Ryan & Riccardo Scarpa & Roger Tourangeau & Ch, 2017. "Contemporary Guidance for Stated Preference Studies," Journal of the Association of Environmental and Resource Economists, University of Chicago Press, vol. 4(2), pages 319-405.
    2. Kjaer, Trine & Gyrd-Hansen, Dorte, 2008. "Preference heterogeneity and choice of cardiac rehabilitation program: Results from a discrete choice experiment," Health Policy, Elsevier, vol. 85(1), pages 124-132, January.
    3. Fosgerau, Mogens & Bierlaire, Michel, 2007. "A practical test for the choice of mixing distribution in discrete choice models," Transportation Research Part B: Methodological, Elsevier, vol. 41(7), pages 784-794, August.
    4. Haghani, Milad & Bliemer, Michiel C.J. & Hensher, David A., 2021. "The landscape of econometric discrete choice modelling research," Journal of choice modelling, Elsevier, vol. 40(C).
    5. Fosgerau, Mogens & Hess, Stephane, 2008. "Competing methods for representing random taste heterogeneity in discrete choice models," MPRA Paper 10038, University Library of Munich, Germany.
    6. Scaccia, Luisa & Marcucci, Edoardo & Gatta, Valerio, 2023. "Prediction and confidence intervals of willingness-to-pay for mixed logit models," Transportation Research Part B: Methodological, Elsevier, vol. 167(C), pages 54-78.
    7. Frick, Bernd & Barros, Carlos Pestana & Prinz, Joachim, 2010. "Analysing head coach dismissals in the German "Bundesliga" with a mixed logit approach," European Journal of Operational Research, Elsevier, vol. 200(1), pages 151-159, January.
    8. Czajkowski, Mikołaj & Bartczak, Anna & Giergiczny, Marek & Navrud, Stale & Żylicz, Tomasz, 2014. "Providing preference-based support for forest ecosystem service management," Forest Policy and Economics, Elsevier, vol. 39(C), pages 1-12.
    9. 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.
    10. Gillespie Rob & Kragt Marit E., 2012. "Accounting for Nonmarket Impacts in a Benefit-Cost Analysis of Underground Coal Mining in New South Wales, Australia," Journal of Benefit-Cost Analysis, De Gruyter, vol. 3(2), pages 1-29, May.
    11. Campbell, Danny & Hutchinson, W. George & Scarpa, Riccardo, 2006. "Lexicographic Preferences in Discrete Choice Experiments: Consequences on Individual-Specific Willingness to Pay Estimates," Sustainability Indicators and Environmental Valuation Working Papers 12224, Fondazione Eni Enrico Mattei (FEEM).
    12. De Ayala Bilbao, Amaya & Hoyos Ramos, David & Mariel Chladkova, Petr, 2012. "Landscape valuation through discrete choice experiments: Current practice and future research reflections," BILTOKI 1134-8984, Universidad del País Vasco - Departamento de Economía Aplicada III (Econometría y Estadística).
    13. Poudel, Niranjan & Singleton, Patrick A., 2024. "Willingness to pay for changes in travel time and work time: A stated choice experiment of US commuters," Research in Transportation Economics, Elsevier, vol. 103(C).
    14. 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.
    15. Halkos, George & Galani, Georgia, 2016. "Assessing willingness to pay for marine and coastal ecosystems: A Case Study in Greece," MPRA Paper 68767, University Library of Munich, Germany.
    16. Campbell, Danny, 2007. "Combining mixed logit models and random effects models to identify the determinants of willingness to pay for rural landscape improvements," 81st Annual Conference, April 2-4, 2007, Reading University, UK 7975, Agricultural Economics Society.
    17. Faustin, Vidogbèna & Adégbidi, Anselme A. & Garnett, Stephen T. & Koudandé, Delphin O. & Agbo, Valentin & Zander, Kerstin K., 2010. "Peace, health or fortune?: Preferences for chicken traits in rural Benin," Ecological Economics, Elsevier, vol. 69(9), pages 1848-1857, July.
    18. Ugo Colombino & Marilena Locatelli, 2008. "Parameters Heterogeneity in a Model of Labour Supply: Exploring the Performance of Mixed Logit," CHILD Working Papers wp21_08, CHILD - Centre for Household, Income, Labour and Demographic economics - ITALY.
    19. Daan Hulshof & Machiel Mulder, 2020. "Willingness to Pay for $$\hbox {CO}_2$$CO2 Emission Reductions in Passenger Car Transport," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 75(4), pages 899-929, April.
    20. Grammatikopoulou, Ioanna & Badura, Tomas & Vačkářová, Davina, 2020. "Public preferences for post 2020 agri-environmental policy in the Czech Republic: A choice experiment approach," Land Use Policy, Elsevier, vol. 99(C).

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wly:hlthec:v:21:y:2012:i:3:p:222-237. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Wiley Content Delivery (email available below). General contact details of provider: http://www3.interscience.wiley.com/cgi-bin/jhome/5749 .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.