Preference Refinement in Deliberative Choice Experiments for Ecosystem Service Valuation

Nele Lienhoop and Marc Völker

Abstract

Choice experiments have gained considerable popularity in ecosystem service valuation. In a one-shot survey respondents are faced with a strenuous task asking them to discover and monetize their preferences for often unfamiliar ecosystem services in a previously unknown hypothetical market situation. We present a deliberative choice experiment that aims to generate well-rationalized value estimates for policy advice. Two aspects of deliberation— discussion and time to reflect—are examined in terms of their effect on preference refinement. We find more comprehensive choice motives after deliberation, as well as indications for preference adjustment and a slight increase in choice certainty. (JEL Q51, Q57)

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