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Does the knowledge of the origin of the health damage matter for WTP estimates?

  • Anne ROZAN
  • Marc WILLINGER

In this paper, we show that expressed willingness-to-pay (WTP) for reducing symptoms caused by air pollution, crucially depends on the respondents being aware of the origin of the symptoms. We observe that the average stated WTP is 50 % higher when respondents are informed in the questionnaire that air pollution is the origin of the bad health state. Since the information about the origin of the improvement of the health state is not neutral with respect to the valuation exercise, we discuss the relative merits of the two alternative methods : providing the information about the origin of the health improvement or not. We argue in favour of the alternative that provides that information. Indeed, without the information provided in the questionnaire, there is a risk that the valuation is based on individual information and subjective references. On the contrary, with the information, all willingness-to-pay are focused on the same cause, providing a better control over individual responses.

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File URL: http://www.beta-umr7522.fr/productions/publications/1999/9904.pdf
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Paper provided by Bureau d'Economie Théorique et Appliquée, UDS, Strasbourg in its series Working Papers of BETA with number 9904.

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Date of creation: 1999
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Handle: RePEc:ulp:sbbeta:9904
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  1. Bente Halvorsen, 1996. "Ordering effects in contingent valuation surveys," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 8(4), pages 485-499, December.
  2. Ståle Navrud, 2001. "Valuing Health Impacts from Air Pollution in Europe," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 20(4), pages 305-329, December.
  3. V. Kerry Smith, 1996. "Can Contingent Valuation Distinguish Economic Values for Different Public Goods?," Land Economics, University of Wisconsin Press, vol. 72(2), pages 139-151.
  4. Hoehn, John P & Randall, Alan, 1989. "Too Many Proposals Pass the Benefit Cost Test," American Economic Review, American Economic Association, vol. 79(3), pages 544-51, June.
  5. Alberini, Anna & Cropper, Maureen & Fu, Tsu-Tan & Krupnick, Alan & Liu, Jin-Tan & Shaw, Daigee & Harrington, Winston, 1997. "Valuing Health Effects of Air Pollution in Developing Countries: The Case of Taiwan," Journal of Environmental Economics and Management, Elsevier, vol. 34(2), pages 107-126, October.
  6. Sen, Amartya K, 1977. "Social Choice Theory: A Re-examination," Econometrica, Econometric Society, vol. 45(1), pages 53-89, January.
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