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The duration effect: a link between TTO and VAS values

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  • Benjamin M. Craig
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    Abstract

    The value of a health state may depend on how long an individual has had to endure the health state (i.e. hedonic load). In this paper, we test the constant proportionality (CP) assumption and determine the sign of relationship between duration and health state value for 42 health states using the nationally representative data from the United Kingdom Measurement and Valuation of Health study. The results reject the CP assumption and suggest that the relationship is negative for optimal health (i.e. fair innings argument) and that the relationship is positive for poorer health states (i.e. adaptation). We find no evidence of the maximum endurable time hypothesis using these data. This evidence on the duration effect has important implications for outcomes research and the economic evaluation of interventions. Copyright © 2008 John Wiley & Sons, Ltd.

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    File URL: http://hdl.handle.net/10.1002/hec.1356
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    Article provided by John Wiley & Sons, Ltd. in its journal Health Economics.

    Volume (Year): 18 (2009)
    Issue (Month): 2 ()
    Pages: 217-225

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    Handle: RePEc:wly:hlthec:v:18:y:2009:i:2:p:217-225

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    Web page: http://www3.interscience.wiley.com/cgi-bin/jhome/5749

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    1. Joshua A. Salomon & Christopher J.L. Murray, 2004. "A multi-method approach to measuring health-state valuations," Health Economics, John Wiley & Sons, Ltd., vol. 13(3), pages 281-290.
    2. Dolan, Paul & Stalmeier, Peep, 2003. "The validity of time trade-off values in calculating QALYs: constant proportional time trade-off versus the proportional heuristic," Journal of Health Economics, Elsevier, vol. 22(3), pages 445-458, May.
    3. Robinson, Angela & Dolan, Paul & Williams, Alan, 1997. "Valuing health status using VAS and TTO: What lies behind the numbers?," Social Science & Medicine, Elsevier, vol. 45(8), pages 1289-1297, October.
    4. Groot, Wim, 2000. "Adaptation and scale of reference bias in self-assessments of quality of life," Journal of Health Economics, Elsevier, vol. 19(3), pages 403-420, May.
    5. Spencer, Anne, 2003. "A test of the QALY model when health varies over time," Social Science & Medicine, Elsevier, vol. 57(9), pages 1697-1706, November.
    6. Han Bleichrodt & José Luis Pinto & José María Abellán-Perpiñán, 2003. "A consistency test of the time trade-off," Economics Working Papers 676, Department of Economics and Business, Universitat Pompeu Fabra.
    7. Badia, Xavier & Roset, Monserrat & Herdman, Michael, 1999. "Inconsistent responses in three preference-elicitation methods for health states," Social Science & Medicine, Elsevier, vol. 49(7), pages 943-950, October.
    8. Dolan, Paul, 1996. "Modelling valuations for health states: the effect of duration," Health Policy, Elsevier, vol. 38(3), pages 189-203, December.
    9. Peep F. M. Stalmeier & Jan J. V. Busschbach & Leida M. Lamers & Paul F. M. Krabbe, 2005. "The gap effect: discontinuities of preferences around dead," Health Economics, John Wiley & Sons, Ltd., vol. 14(7), pages 679-685.
    10. Bleichrodt, Han & Johannesson, Magnus, 1997. "Standard gamble, time trade-off and rating scale: Experimental results on the ranking properties of QALYs," Journal of Health Economics, Elsevier, vol. 16(2), pages 155-175, April.
    11. Marjon M. Van Der Pol & John A. Cairns, 2000. "Negative and zero time preference for health," Health Economics, John Wiley & Sons, Ltd., vol. 9(2), pages 171-175.
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    Cited by:
    1. Craig., Benjamin M. & Busschbach, Jan J.V., 2011. "Revisiting United States valuation of EQ-5D states," Journal of Health Economics, Elsevier, vol. 30(5), pages 1057-1063.
    2. Sharma, Rajiv & Stano, Miron, 2010. "Implications of an economic model of health states worse than dead," Journal of Health Economics, Elsevier, vol. 29(4), pages 536-540, July.
    3. Dolan, Paul & Kavetsos, Georgios & Tsuchiya, Aki, 2013. "Sick but satisfied: The impact of life and health satisfaction on choice between health scenarios," Journal of Health Economics, Elsevier, vol. 32(4), pages 708-714.

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