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The QALY model wich came in from a general population survey: roughly multiplicative, broadly nonlinear and sometimes contex-dependt

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Abstract

Este trabajo aplica un método, propuesto inicialmente por Miyamoto (2000), para ajustar los pesos de calidad de vida (o utilidades de los estados de salud) en función de la curvatura de la función de utilidad del tiempo de vida. El procedimiento de ajuste aplicado es robusto ante fenómenos como la propagación del error y el sesgo ocasionado por la transformación de la probabilidad. Los parámetros de curvatura estimados fueron, por lo general, consistentes con la evidencia empírica precedente. Asimismo, el presente estudio también recoge varios contrastes de axiomas clave para el modelo AVAC (Año de Vida Ajustado por la Calidad), válidos tanto para el paradigma de la utilidad esperada como para el paradigma de la utilidad dependiente del orden. Los resultados alcanzados, merced a una encuesta realizada a una gran muestra de población general, sugieren que las preferencias “medianas” de dicha muestra pueden aproximarse razonablemente bien mediante un modelo AVAC multiplicativo, dotado de una función de utilidad potencial del tiempo de vida. Por último, para un número relativamente considerable de estados de salud, hallamos evidencia contraria a la práctica habitual de transferir las utilidades de los estados de salud del contexto de decisión en el que fueron estimadas (p.ej. un contexto de certidumbre) a otro contexto diferente (p.ej. un contexto de incertidumbre).

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File URL: http://www.centrodeestudiosandaluces.info/PDFS/E200904.pdf
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Bibliographic Info

Paper provided by Centro de Estudios Andaluces in its series Economic Working Papers at Centro de Estudios Andaluces with number E2009/04.

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Length: 50 pages
Date of creation: 2009
Date of revision:
Handle: RePEc:cea:doctra:e2009_04

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Related research

Keywords: biases; expected utility; rank-dependent utility; time trade-off; value lottery equivalence;

This paper has been announced in the following NEP Reports:

References

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  1. 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.
  2. Adam Oliver, 2005. "Testing the internal consistency of the lottery equivalents method using health outcomes," Health Economics, John Wiley & Sons, Ltd., vol. 14(2), pages 149-159.
  3. 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.
  4. 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.
  5. 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.
  6. Han Bleichrodt & Ulrich Schmidt, 2002. "A Context-Dependent Model of the Gambling Effect," Management Science, INFORMS, vol. 48(6), pages 802-812, June.
  7. Oliver, Adam, 2003. "The internal consistency of the standard gamble: tests after adjusting for prospect theory," Journal of Health Economics, Elsevier, vol. 22(4), pages 659-674, July.
  8. 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.
  9. 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.
  10. Jacinto Braga & Chris Starmer, 2005. "Preference Anomalies, Preference Elicitation and the Discovered Preference Hypothesis," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 32(1), pages 55-89, 09.
  11. Abdellaoui, Mohammed & Barrios, Carolina & Wakker, Peter P., 2007. "Reconciling introspective utility with revealed preference: Experimental arguments based on prospect theory," Journal of Econometrics, Elsevier, vol. 138(1), pages 356-378, May.
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