Contingent Valuation: From Dubious to Hopeless
Approximately 20 years ago, Peter Diamond and I wrote an article for this journal analyzing contingent valuation methods. At that time Peter's view was that contingent valuation was hopeless, while I was dubious but somewhat more optimistic. But 20 years later, after millions of dollars of largely government-funded research, I have concluded that Peter's earlier position was correct and that contingent valuation is hopeless. In this paper, I selectively review the contingent valuation literature, focusing on empirical results. I find that three long-standing problems continue to exist: 1) hypothetical response bias that leads contingent valuation to overstatements of value; 2) large differences between willingness to pay and willingness to accept; and 3) the embedding problem which encompasses scope problems. The problems of embedding and scope are likely to be the most intractable. Indeed, I believe that respondents to contingent valuation surveys are often not responding out of stable or well-defined preferences, but are essentially inventing their answers on the fly, in a way which makes the resulting data useless for serious analysis. Finally, I offer a case study of a prominent contingent valuation study done by recognized experts in this approach, a study that should be only minimally affected by these concerns but in which the answers of respondents to the survey are implausible and inconsistent.
Volume (Year): 26 (2012)
Issue (Month): 4 (Fall)
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- Kahneman, Daniel & Knetsch, Jack L., 1992. "Valuing public goods: The purchase of moral satisfaction," Journal of Environmental Economics and Management, Elsevier, vol. 22(1), pages 57-70, January.
- Johnston, Robert J., 2006. "Is hypothetical bias universal? Validating contingent valuation responses using a binding public referendum," Journal of Environmental Economics and Management, Elsevier, vol. 52(1), pages 469-481, July.
- Heberlein, Thomas A. & Wilson, Matthew A. & Bishop, Richard C. & Schaeffer, Nora Cate, 2005. "Rethinking the scope test as a criterion for validity in contingent valuation," Journal of Environmental Economics and Management, Elsevier, vol. 50(1), pages 1-22, July.
- Hausman, Jerry A, 1981. "Exact Consumer's Surplus and Deadweight Loss," American Economic Review, American Economic Association, vol. 71(4), pages 662-76, September.
- Vossler, Christian A. & Kerkvliet, Joe & Polasky, Stephen & Gainutdinova, Olesya, 2003. "Externally validating contingent valuation: an open-space survey and referendum in Corvallis, Oregon," Journal of Economic Behavior & Organization, Elsevier, vol. 51(2), pages 261-277, June.
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