Analyzing the determinants of willingness-to-pay values for testing the validity of the contingent valuation method. Application to home care compared to hospital care
The contingent valuation (CV) method is an attractive approach for comparing home care to hospital care in which the only difference is patients' well-being during the treatment process and not health outcomes. We considered the empirical situation of blood transfusion (BT) in cancer patients and collected willingness to pay (WTP) values among BT users. Our main objective was to test the validity of the CV method, namely its ability to elicit true preferences. Firstly, possible determinants of WTP values and their expected influences were identified, from both economic and non economic literature and from the findings of a pilot study. Secondly, they were compared to predicted influences resulting from appropriate econometric analysis of WTP values elicited by a bidding process. From the health economics literature it appeared that the double-hurdle model is the most appropriate approach to account for zero values and protest responses. However, because the number of protest responses was too small, we used a truncated regression model. None of the 7 hypothesized influences was invalidated by econometric results. The anchoring bias hypothesis was confirmed. The WTP for home BT compared to hospital BT increased with household income, with previous experience of home care, with living far from the hospital and with low quality of life. Conversely, it was lower for advanced-stage (palliative or terminal) than for early-stage (curative) patients. We conclude that the CV approach is acceptable to severely ill patients. Moreover, WTP values demonstrate good validity given that influences predicted by our model are consistent with expected determinants.
|Date of creation:||2008|
|Publication status:||Published in Working paper GATE 08-20. 2008|
|Note:||View the original document on HAL open archive server: https://halshs.archives-ouvertes.fr/halshs-00303725|
|Contact details of provider:|| Web page: https://hal.archives-ouvertes.fr/|
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- Drummond, Michael F. & Sculpher, Mark J. & Torrance, George W. & O'Brien, Bernie J. & Stoddart, Greg L., 2005. "Methods for the Economic Evaluation of Health Care Programmes," OUP Catalogue, Oxford University Press, edition 3, number 9780198529453.
- Johannesson, Magnus & Jonsson, Bengt & Borgquist, Lars, 1991. "Willingness to pay for antihypertensive therapy -- results of a Swedish pilot study," Journal of Health Economics, Elsevier, vol. 10(4), pages 461-473.
- Emmanuel Flachaire & Guillaume Hollard, 2007.
"Starting-point bias and respondent uncertainty in dichotomous choice contingent valuation surveys,"
Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers)
- Flachaire, Emmanuel & Hollard, Guillaume, 2007. "Starting point bias and respondent uncertainty in dichotomous choice contingent valuation surveys," Resource and Energy Economics, Elsevier, vol. 29(3), pages 183-194, September.
- Johannesson, Magnus & Johansson, Per-Olov & Kristrom, Bengt & Gerdtham, Ulf-G., 1993. "Willingness to pay for antihypertensive therapy -- further results," Journal of Health Economics, Elsevier, vol. 12(1), pages 95-108, April.
- Meyerhoff, Jurgen & Liebe, Ulf, 2006. "Protest beliefs in contingent valuation: Explaining their motivation," Ecological Economics, Elsevier, vol. 57(4), pages 583-594, June.
- Raymond Y. T. Yeung & Richard D. Smith & Lai-Ming Ho & Janice M. Johnston & Gabriel M. Leung, 2006. "Empirical implications of response acquiescence in discrete-choice contingent valuation," Health Economics, John Wiley & Sons, Ltd., vol. 15(10), pages 1077-1089.
- Sayman, Serdar & Onculer, Ayse, 2005. "Effects of study design characteristics on the WTA-WTP disparity: A meta analytical framework," Journal of Economic Psychology, Elsevier, vol. 26(2), pages 289-312, April.
- Amemiya, Takeshi, 1984. "Tobit models: A survey," Journal of Econometrics, Elsevier, vol. 24(1-2), pages 3-61.
- Richard D. Smith, 2003. "Construction of the contingent valuation market in health care:a critical assessment," Health Economics, John Wiley & Sons, Ltd., vol. 12(8), pages 609-628.
- Cam Donaldson & Andrew Jones & Tracy Mapp & Jan Abel Olson, 1998. "Limited dependent variables in willingness to pay studies: applications in health care," Applied Economics, Taylor & Francis Journals, vol. 30(5), pages 667-677.
- Jones, Andrew M, 1992. "A Note on Computation of the Double-Hurdle Model with Dependence with an Application to Tobacco Expenditure," Bulletin of Economic Research, Wiley Blackwell, vol. 44(1), pages 67-74, January.
- Blundell, Richard William & Ham, John & Meghir, Costas, 1987.
"Unemployment and Female Labour Supply,"
CEPR Discussion Papers
149, C.E.P.R. Discussion Papers.
- Cam Donaldson & Phil Shackley & Mona Abdalla & Zosia Miedzybrodzka, 1995. "Willingness to pay for antenatal carrier screening for cystic fibrosis," Health Economics, John Wiley & Sons, Ltd., vol. 4(6), pages 439-452, November.
- Brown, Thomas C., 2005. "Loss aversion without the endowment effect, and other explanations for the WTA-WTP disparity," Journal of Economic Behavior & Organization, Elsevier, vol. 57(3), pages 367-379, July.
- Flood, Lennart & Gråsjö, Urban, 1998. "Regression Analysis and Time Use Data A Comparison of Microeconometric Approaches with Data from the Swedish Time Use Survey (HUS)," Working Papers in Economics 5, University of Gothenburg, Department of Economics.
- Donaldson, Cam, 1999. "Valuing the benefits of publicly-provided health care: does 'ability to pay' preclude the use of 'willingness to pay'?," Social Science & Medicine, Elsevier, vol. 49(4), pages 551-563, August.
- Richard D. Smith, 2007. "Use, option and externality values: are contingent valuation studies in health care mis-specified?," Health Economics, John Wiley & Sons, Ltd., vol. 16(8), pages 861-869.
- Bradley Jorgensen & Geoffrey Syme & Brian Bishop & Blair Nancarrow, 1999. "Protest Responses in Contingent Valuation," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 14(1), pages 131-150, July.
- A Diener & B O'Brien & A Gafni, 1997.
"Health Care Contingent Valuation Studies: A review and classification of the literature,"
Centre for Health Economics and Policy Analysis Working Paper Series
1997-07, Centre for Health Economics and Policy Analysis (CHEPA), McMaster University, Hamilton, Canada.
- Alan Diener & Bernie O'Brien & Amiram Gafni, 1998. "Health care contingent valuation studies: a review and classification of the literature," Health Economics, John Wiley & Sons, Ltd., vol. 7(4), pages 313-326.
- Jan Abel Olsen & Richard D. Smith, 2001. "Theory versus practice: a review of 'willingness-to-pay' in health and health care," Health Economics, John Wiley & Sons, Ltd., vol. 10(1), pages 39-52.