IDEAS home Printed from https://ideas.repec.org/a/wly/hlthec/v30y2021i5p923-931.html
   My bibliography  Save this article

Sample restrictions and the elicitation of a constant willingness to pay per quality adjusted life year

Author

Listed:
  • Jytte Seested Nielsen
  • Dorte Gyrd‐Hansen
  • Trine Kjær

Abstract

It is well established that the underlying theoretical assumptions needed to obtain a constant proportional trade‐off between a quality adjusted life year (QALY) and willingness to pay (WTP) are restrictive and often empirically violated. In this paper, we set out to investigate whether the proportionality conditions (in terms of scope insensitivity and severity independence) can be satisfied when data is restricted to include only respondents who pass certain consistency criteria. We hypothesize that the more we restrict the data, the better the compliance with the requirement of constant proportional trade‐off between WTP and QALY. We revisit the Danish data from the European Value of a QALY survey eliciting individual WTP for a QALY (WTP‐Q). Using a “chained approach” respondents were first asked to value a specified health state using the standard gamble (SG) or the time‐trade‐off (TTO) approach and subsequently asked their WTP for QALY gains of 0.05 and 0.1 (tailored according to the respondent's SG/TTO valuation). Analyzing the impact of the different exclusion criteria on the two proportionality conditions, we find strong evidence against a constant WTP‐Q. Restricting our data to include only respondents who pass the most stringent consistency criteria does not impact on the performance of the proportionality conditions for WTP‐Q.

Suggested Citation

  • Jytte Seested Nielsen & Dorte Gyrd‐Hansen & Trine Kjær, 2021. "Sample restrictions and the elicitation of a constant willingness to pay per quality adjusted life year," Health Economics, John Wiley & Sons, Ltd., vol. 30(5), pages 923-931, May.
    • Handle: RePEc:wly:hlthec:v:30:y:2021:i:5:p:923-931
    DOI: 10.1002/hec.4236
    as

    Download full text from publisher

    File URL: https://doi.org/10.1002/hec.4236
    Download Restriction: no
    File URL: https://libkey.io/10.1002/hec.4236?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. 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.
    2. James K. Hammitt & Fangli Geng & Xiaoqi Guo & Chris P. Nielsen, 2019. "Valuing mortality risk in China: Comparing stated-preference estimates from 2005 and 2016," Journal of Risk and Uncertainty, Springer, vol. 58(2), pages 167-186, June.
    3. 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.
    4. Ana Bobinac & Job Exel & Frans Rutten & Werner Brouwer, 2014. "The Value of a QALY: Individual Willingness to Pay for Health Gains Under Risk," PharmacoEconomics, Springer, vol. 32(1), pages 75-86, January.
    5. Bobinac, Ana & van Exel, N. Job A. & Rutten, Frans F.H. & Brouwer, Werner B.F., 2012. "GET MORE, PAY MORE? An elaborate test of construct validity of willingness to pay per QALY estimates obtained through contingent valuation," Journal of Health Economics, Elsevier, vol. 31(1), pages 158-168.
    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. Darius N. Lakdawalla & Charles E. Phelps, 2022. "A guide to extending and implementing generalized risk-adjusted cost-effectiveness (GRACE)," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 23(3), pages 433-451, April.

    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. 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.
    2. Björn Sund & Mikael Svensson, 2018. "Estimating a constant WTP for a QALY—a mission impossible?," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 19(6), pages 871-880, July.
    3. 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.
    4. Ryen, Linda & Svensson, Mikael, 2014. "The Willingness to Pay for a QALY: a Review of the Empirical Literature," Karlstad University Working Papers in Economics 12, Karlstad University, Department of Economics.
    5. 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.
    6. Ahlert, Marlies & Breyer, Friedrich & Schwettmann, Lars, 2016. "How you ask is what you get: Framing effects in willingness-to-pay for a QALY," Social Science & Medicine, Elsevier, vol. 150(C), pages 40-48.
    7. 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.
    8. 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.
    9. Attema, Arthur & Frasch, Jona & L'Haridon, Olivier, 2020. "Multivariate risk preferences in the QALY model," MPRA Paper 103339, University Library of Munich, Germany.
    10. 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.
    11. Lotte Soeteman & Job Exel & Ana Bobinac, 2017. "The impact of the design of payment scales on the willingness to pay for health gains," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 18(6), pages 743-760, July.
    12. Sebastian Himmler & Jannis Stöckel & Job van Exel & Werner B. F. Brouwer, 2021. "The value of health—Empirical issues when estimating the monetary value of a quality‐adjusted life year based on well‐being data," Health Economics, John Wiley & Sons, Ltd., vol. 30(8), pages 1849-1870, August.
    13. Claxton, Karl & Asaria, Miqdad & Chansa, Collins & Jamison, Julian & Lomas, James & Ochalek, Jessica & Paulden, Mike, 2019. "Accounting for Timing when Assessing Health-Related Policies," Journal of Benefit-Cost Analysis, Cambridge University Press, vol. 10(S1), pages 73-105, April.
    14. Sebastian Himmler & Job Exel & Werner Brouwer, 2022. "Did the COVID-19 pandemic change the willingness to pay for an early warning system for infectious diseases in Europe?," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 23(1), pages 81-94, February.
    15. Claxton, Karl & Asaria, Miqdad & Chansa, Collins & Jamison, Julian & Lomas, James & Ochalek, Jessica & Paulden, Mike, 2019. "Accounting for timing when assessing health-related policies," LSE Research Online Documents on Economics 100038, London School of Economics and Political Science, LSE Library.
    16. Sun, Sizhong, 2022. "The demand for a COVID-19 vaccine," Economics & Human Biology, Elsevier, vol. 46(C).
    17. Meg Perry-Duxbury & Sebastian Himmler & Job Exel & Werner Brouwer, 2023. "Willingness to pay for health gains from an international integrated early warning system for infectious disease outbreaks," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 24(6), pages 967-986, August.
    18. 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.
    19. Fischer, Barbara & Telser, Harry & Zweifel, Peter & von Wyl, Viktor & Beck, Konstantin & Weber, Andreas, 2023. "The value of a QALY towards the end of life and its determinants: Experimental evidence," Social Science & Medicine, Elsevier, vol. 326(C).
    20. McNamara, Simon & Tsuchiya, Aki & Holmes, John, 2021. "Does the UK-public's aversion to inequalities in health differ by group-labelling and health-gain type? A choice-experiment," Social Science & Medicine, Elsevier, vol. 269(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:30:y:2021:i:5:p:923-931. 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.