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The influence of subjective expectations about length and quality of life on time trade‐off answers

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  • Floortje van Nooten
  • Werner Brouwer

Abstract

When answering TTO questions respondents sometimes have to imagine being in a certain health state during their remaining lifespan, often based on objective life tables. Respondents however may have subjective expectations about length and quality of life that differ from the objective ones. If respondents do not fully abstract from own expectations, TTO scores may be biased. In this note, we indicate how subjective expectations could influence TTO scores and present some empirical findings suggesting that they do. Our results indicate that subjective expectations may serve as unobserved reference points and as such influence TTO responses. Copyright © 2004 John Wiley & Sons, Ltd.

Suggested Citation

  • Floortje van Nooten & Werner Brouwer, 2004. "The influence of subjective expectations about length and quality of life on time trade‐off answers," Health Economics, John Wiley & Sons, Ltd., vol. 13(8), pages 819-823, August.
    • Handle: RePEc:wly:hlthec:v:13:y:2004:i:8:p:819-823
    DOI: 10.1002/hec.873
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    1. Attema, Arthur E. & Brouwer, Werner B.F. & l’Haridon, Olivier, 2013. "Prospect theory in the health domain: A quantitative assessment," Journal of Health Economics, Elsevier, vol. 32(6), pages 1057-1065.
    2. Arthur Attema & Werner Brouwer, 2012. "The way that you do it? An elaborate test of procedural invariance of TTO, using a choice-based design," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 13(4), pages 491-500, August.
    3. Stefan A. Lipman & Werner B.F. Brouwer & Arthur E. Attema, 2019. "QALYs without bias? Nonparametric correction of time trade‐off and standard gamble weights based on prospect theory," Health Economics, John Wiley & Sons, Ltd., vol. 28(7), pages 843-854, July.
    4. F. E. van Nooten & X. Koolman & W. B. F. Brouwer, 2009. "The influence of subjective life expectancy on health state valuations using a 10 year TTO," Health Economics, John Wiley & Sons, Ltd., vol. 18(5), pages 549-558, May.
    5. Stefan A. Lipman & Arthur E. Attema, 2019. "Rabin's paradox for health outcomes," Health Economics, John Wiley & Sons, Ltd., vol. 28(8), pages 1064-1071, August.
    6. Sahar Al Shabasy & Fatima Al Sayah & Maggie Abbassi & Samar Farid, 2022. "Determinants of Health Preferences Using Data from the Egyptian EQ-5D-5L Valuation Study," The Patient: Patient-Centered Outcomes Research, Springer;International Academy of Health Preference Research, vol. 15(5), pages 589-598, September.
    7. Doukyoung Chon & Ki Bong Yoo & Jae-Hyun Kim, 2019. "Belief about the future possibility of national aging security system and its association with mortality," PLOS ONE, Public Library of Science, vol. 14(2), pages 1-11, February.
    8. Stefan A. Lipman & Arthur E. Attema & Matthijs M. Versteegh, 2022. "Correcting for discounting and loss aversion in composite time trade‐off," Health Economics, John Wiley & Sons, Ltd., vol. 31(8), pages 1633-1648, August.
    9. Lipman, Stefan A. & Brouwer, Werner B.F. & Attema, Arthur E., 2020. "Living up to expectations: Experimental tests of subjective life expectancy as reference point in time trade-off and standard gamble," Journal of Health Economics, Elsevier, vol. 71(C).
    10. Arthur E. Attema & Han Bleichrodt & Olivier l’Haridon & Stefan A. Lipman, 2020. "A comparison of individual and collective decision making for standard gamble and time trade-off," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 21(3), pages 465-473, April.
    11. Floortje Nooten & Jan Busschbach & Michel Agthoven & Job Exel & Werner Brouwer, 2018. "What should we know about the person behind a TTO?," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 19(9), pages 1207-1211, December.
    12. Brouwer, Werner B.F. & van Exel, N. Job A., 2005. "Expectations regarding length and health related quality of life: Some empirical findings," Social Science & Medicine, Elsevier, vol. 61(5), pages 1083-1094, September.

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