Nakatani Jun, Aramaki Toshiya, Hanaki Keisuke
Department of Urban Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Environ Manage. 2007 Aug;84(3):362-76. doi: 10.1016/j.jenvman.2007.03.025.
In this study, improvements of different types of environmental issues in Japan, (i) reduction of mortality risk due to exposure to suspended particulate matter (SPM), (ii) improvement of the water quality of an urban river, and (iii) protection of goshawks, were evaluated in monetary terms using choice experiments. It was found that the reduction of mortality risk and the improvement of the water quality were highly valued, while residents did not place high value on the protection of goshawks. However, scope sensitivity was not observed in the evaluation of each issue and the presence of moral satisfaction was revealed. Excluding the effect of lexicographic choices could partly solve the problem concerning scope sensitivity. The results suggested that non-scope sensitive values that were unrelated to or inconsistent with the level of environmental improvement could be estimated through choice experiments in this research.
在本研究中，运用选择实验从货币角度评估了日本不同类型环境问题的改善情况，具体包括：（i）降低因接触悬浮颗粒物（SPM）导致的死亡风险；（ii）改善城市河流的水质；（iii）保护苍鹰。研究发现，降低死亡风险和改善水质受到高度重视，而居民对苍鹰保护的重视程度不高。然而，在对每个问题的评估中未观察到范围敏感性，且发现了道德满足感的存在。排除字典式选择的影响可以部分解决范围敏感性问题。结果表明，通过本研究中的选择实验可以估计与环境改善水平无关或不一致的非范围敏感值。
