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Validity of Willingness to Pay Measures under Preference Uncertainty

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  • Carola Braun
  • Katrin Rehdanz
  • Ulrich Schmidt

Abstract

Recent studies in the marketing literature developed a new method for eliciting willingness to pay (WTP) with an open-ended elicitation format: the Range-WTP method. In contrast to the traditional approach of eliciting WTP as a single value (Point-WTP), Range-WTP explicitly allows for preference uncertainty in responses. The aim of this paper is to apply Range-WTP to the domain of contingent valuation and to test for its theoretical validity and robustness in comparison to the Point-WTP. Using data from two novel large-scale surveys on the perception of solar radiation management (SRM), a little-known technique for counteracting climate change, we compare the performance of both methods in the field. In addition to the theoretical validity (i.e. the degree to which WTP values are consistent with theoretical expectations), we analyse the test-retest reliability and stability of our results over time. Our evidence suggests that the Range-WTP method clearly outperforms the Point-WTP method.

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  • Carola Braun & Katrin Rehdanz & Ulrich Schmidt, 2016. "Validity of Willingness to Pay Measures under Preference Uncertainty," PLOS ONE, Public Library of Science, vol. 11(4), pages 1-17, April.
    • Handle: RePEc:plo:pone00:0154078
    DOI: 10.1371/journal.pone.0154078
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