Journal
LAND ECONOMICS
Volume 77, Issue 3, Pages 315-326Publisher
UNIV WISCONSIN
DOI: 10.2307/3147126
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Four clicitation methods are compared in a split-sample, contingent-valuation study, valuing avoidance of episodes of ill health linked to air pollution: two discrete methods and two more-continuous methods. Respondents to a traditional payment card (PC) question gave willingness-to-pay values that were lower than those implied by dichotomous-choice (DC) responses. However, followup questions showed that DC respondents were less certain of their stated behavior than st,cre PC respondents. When respondents were told to be almost certain of their responses, responses to the DC and the PC formats converged.
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