Richard O‘Conor; Johannesson, Magnus; Johansson, Per-Olov - In: Environmental & Resource Economics 13 (1999) 2, pp. 235-248
We compare different contingent valuation question formats with each other and with observed behaviour for a non-monetary estimation task, the expected number of kilometers travelled by automobile. Open-ended questions, open-ended follow-up questions, dichotomous choice (DC) questions, and...