Deriving time discounting correction factors for TTO tariffs
The Time Tradeoff (TTO) method is a popular method for valuing health state utilities and is frequently used in economic evaluations. However, this method produces utilities that are distorted by several biases. One important bias entails the failure to incorporate time discounting. This paper aims to measure time discounting for health outcomes in a sample representative for the general population. In particular, we estimate TTO scores alongside time discounting in order to derive a set of correction factors that can be employed to correct raw TTO scores for the downward bias caused by time discounting. We find substantial positive correction factors, which are increasing with the severity of the health state. Furthermore, higher discounting is found when using more severe health states in the discounting elicitation task. More research is needed to further develop discount rate elicitation procedures and test their validity, especially in general public samples. Moreover, future research should investigate the correction of TTO score for other biases as well, such as loss aversion, and to develop a criterion to test the external validity of TTO scores.
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- Han Bleichrodt & Jose Luis Pinto, 2000. "A Parameter-Free Elicitation of the Probability Weighting Function in Medical Decision Analysis," Management Science, INFORMS, vol. 46(11), pages 1485-1496, November.
- Bleichrodt, Han, 2001. " Probability Weighting in Choice under Risk: An Empirical Test," Journal of Risk and Uncertainty, Springer, vol. 23(2), pages 185-98, September.
- David Parkin & Nancy Devlin, 2006.
"Is there a case for using visual analogue scale valuations in cost-utility analysis?,"
John Wiley & Sons, Ltd., vol. 15(7), pages 653-664.
- Parkin, D. & Devlin, N., 2004. "Is there a case for using Visual Analogue Scale valuations in Cost-Utility Analysis?," Working Papers 04/03, Department of Economics, City University London.
- Chetan Dave & Catherine Eckel & Cathleen Johnson & Christian Rojas, 2010. "Eliciting risk preferences: When is simple better?," Journal of Risk and Uncertainty, Springer, vol. 41(3), pages 219-243, December.
- Linda D. MacKeigan & Amiram Gafni & Bernie J. O'Brien, 2003. "Double discounting of QALYs," Health Economics, John Wiley & Sons, Ltd., vol. 12(2), pages 165-169.
- Torrance, George W., 1986. "Measurement of health state utilities for economic appraisal : A review," Journal of Health Economics, Elsevier, vol. 5(1), pages 1-30, March.
- John D. Hey & Andrea Morone & Ulrich Schmidt, 2007.
"Noise and Bias in Eliciting Preferences,"
Kiel Working Papers
1386, Kiel Institute for the World Economy.
- L. M. Lamers & J. McDonnell & P. F. M. Stalmeier & P. F. M. Krabbe & J. J. V. Busschbach, 2006. "The Dutch tariff: results and arguments for an effective design for national EQ-5D valuation studies," Health Economics, John Wiley & Sons, Ltd., vol. 15(10), pages 1121-1132.
- van der Pol, Marjon & Cairns, John, 2008. "Comparison of two methods of eliciting time preference for future health states," Social Science & Medicine, Elsevier, vol. 67(5), pages 883-889, September.
- Attema, Arthur E. & Brouwer, Werner B.F., 2009. "The correction of TTO-scores for utility curvature using a risk-free utility elicitation method," Journal of Health Economics, Elsevier, vol. 28(1), pages 234-243, January.
- Peter Wakker & Daniel Deneffe, 1996. "Eliciting von Neumann-Morgenstern Utilities When Probabilities Are Distorted or Unknown," Management Science, INFORMS, vol. 42(8), pages 1131-1150, August.
- Arthur E. Attema & Werner B. F. Brouwer, 2008. "Can we fix it? Yes we can! But what? A new test of procedural invariance in TTO-measurement," Health Economics, John Wiley & Sons, Ltd., vol. 17(7), pages 877-885.
- van der Pol, Marjon & Cairns, John, 2002. "A comparison of the discounted utility model and hyperbolic discounting models in the case of social and private intertemporal preferences for health," Journal of Economic Behavior & Organization, Elsevier, vol. 49(1), pages 79-96, September.
- Han Bleichrodt, 2002. "A new explanation for the difference between time trade-off utilities and standard gamble utilities," Health Economics, John Wiley & Sons, Ltd., vol. 11(5), pages 447-456.
- Hugh Gravelle & Werner Brouwer & Louis Niessen & Maarten Postma & Frans Rutten, 2007. "Discounting in economic evaluations: stepping forward towards optimal decision rules," Health Economics, John Wiley & Sons, Ltd., vol. 16(3), pages 307-317.
- Kahneman, Daniel & Tversky, Amos, 1979.
"Prospect Theory: An Analysis of Decision under Risk,"
Econometric Society, vol. 47(2), pages 263-91, March.
- Amos Tversky & Daniel Kahneman, 1979. "Prospect Theory: An Analysis of Decision under Risk," Levine's Working Paper Archive 7656, David K. Levine.
- van der Pol, Marjon & Cairns, John, 2001. "Estimating time preferences for health using discrete choice experiments," Social Science & Medicine, Elsevier, vol. 52(9), pages 1459-1470, May.
- Bostic, Raphael & Herrnstein, R. J. & Luce, R. Duncan, 1990. "The effect on the preference-reversal phenomenon of using choice indifferences," Journal of Economic Behavior & Organization, Elsevier, vol. 13(2), pages 193-212, March.
- Tversky, Amos & Kahneman, Daniel, 1992. " Advances in Prospect Theory: Cumulative Representation of Uncertainty," Journal of Risk and Uncertainty, Springer, vol. 5(4), pages 297-323, October.
- Han Bleichrodt & Jose Maria Abellan-Perpiñan & Jose Luis Pinto-Prades & Ildefonso Mendez-Martinez, 2007.
"Resolving Inconsistencies in Utility Measurement Under Risk: Tests of Generalizations of Expected Utility,"
INFORMS, vol. 53(3), pages 469-482, March.
- Han Bleichrodt & José María Abellán-Perpiñan & JoséLuis Pinto & Ildefonso Méndez-Martínez, 2005. "Resolving inconsistencies in utility measurement under risk: Tests of generalizations of expected utility," Economics Working Papers 798, Department of Economics and Business, Universitat Pompeu Fabra.
- Han Bleichrodt & Jose María Abellán Perpiñán & Jose Luis Pinto-Prades & Ildefonso Méndez-Martínez, 2006. "Resolving Inconsistencies in Utility Measurement under Risk: Tests of Generalizations of Expected Utility," Working Papers 06.19, Universidad Pablo de Olavide, Department of Economics.
- Chris Starmer, 2000. "Developments in Non-expected Utility Theory: The Hunt for a Descriptive Theory of Choice under Risk," Journal of Economic Literature, American Economic Association, vol. 38(2), pages 332-382, June.
- Tversky, Amos & Kahneman, Daniel, 1991. "Loss Aversion in Riskless Choice: A Reference-Dependent Model," The Quarterly Journal of Economics, MIT Press, vol. 106(4), pages 1039-61, November.
- 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.
- Marjon Pol & Larissa Roux, 2005. "Time preference bias in time trade-off," The European Journal of Health Economics, Springer, vol. 6(2), pages 107-111, June.
- 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.
- Abellan-Perpiñan, Jose Maria & Bleichrodt, Han & Pinto-Prades, Jose Luis, 2009. "The predictive validity of prospect theory versus expected utility in health utility measurement," Journal of Health Economics, Elsevier, vol. 28(6), pages 1039-1047, December.
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