手法を比較

	Benefit Transfer Method	エコシステムサービス評価
分野	経済学	持続可能性
系統	Process / pipeline	Process / pipeline
提唱年	1992	1997
提唱者	Applied environmental-economics practice (formalized by Boyle & Bergstrom; Rosenberger & Loomis)	Robert Costanza, Rudolf de Groot, and team
種類	Secondary valuation: transferring existing estimates to a new policy site	Valuation method
原典	Rosenberger, R. S., & Loomis, J. B. (2003). Benefit transfer. In P. A. Champ, K. J. Boyle, & T. C. Brown (Eds.), A Primer on Nonmarket Valuation. Kluwer/Springer. ISBN: 9780792364986	Costanza, R., d'Arge, R., de Groot, R., Farberk, S., Grasso, M., Hannon, B., ... & van den Belt, M. (1997). The value of the world's ecosystem services and natural capital. Nature, 387(6630), 253-260.
別名	Benefit Transfer, Value Transfer, Unit Value Transfer, Benefit Function Transfer	ESV, Natural capital accounting, Environmental valuation
関連	4	3
概要	Benefit transfer is the practice of estimating the economic value of a nonmarket good — clean water, a recreation site, an endangered species, an avoided health risk — at a new 'policy site' by adapting value estimates from one or more existing 'study sites' where primary valuation research was already conducted. Because original contingent-valuation, choice-experiment, or hedonic studies are expensive and slow, analysts facing limited time and budgets transfer existing results, ranging from simply borrowing a single dollar value (unit value transfer) to transplanting an entire estimated valuation function (function transfer) or predicting from a meta-regression of many prior studies.	Ecosystem Services Valuation (ESV) is a framework pioneered by Costanza and colleagues (1997) that assigns economic value to the benefits nature provides to humanity—from pollination and water purification to climate regulation and cultural enjoyment. Formalized in the Millennium Ecosystem Assessment (2005) and The Economics of Ecosystems and Biodiversity (TEEB 2010), ESV bridges ecology and economics to make the invisible value of ecosystems visible to policymakers and markets.