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[IR-1.4 A Study on Applicability of Contingent valuation Method in Japan (Final Report)]

[Contact Person]

Hidano Noboru
Professor
Department of Social Engineering
Graduate School of Decision Science and Technology
Tokyo Institute of Technology
2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552
Tel:+81-3-5734-3185 Fax:+81-3-5734-3582

[Total Budget for FY1995-FY1997]

4,500,000 Yen (FY1997;4,500,000 Yen)

[Abstract]

This study focuses on the three major elicitation methods of willingness-to pay (WTP) used in contingent valuation approach and compares their performance in an empirical test. This study treats open-ended (OE) question format, payment card (PC) question format and double-bounded dichotomous (DD) question format. An empirical survey was conducted in 1998 asking the economic value of preserving River Satsunai. Among the households in the river basin, 1200 households were randomly chosen and 694 could be interviewed in person, DD format produced highest mean and median WTP being consistent with a theoretical prediction. There was no sign of people telling a lie in DD format judging from respondents' confidence on their stated yen amounts. One potential drawback of DD format was found, that was the increases of protest answers in high bid amounts. This fact suggested that people who did not want to accept the bid tended to choose protest answers rather than rejection. This tendency limited the effective number of respondents and lessened the generality of estimated WTP. To reduce the effect of this tendency, a change of DD format is proposed.

[Key Words]

Contingent Valuation Method, Elicitation Method, Impure Altruism, Willingness-to-Pay