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The travel cost method of economic valuation, travel cost analysis, or Clawson method is a revealed preference method of economic valuation used in cost–benefit analysis to calculate the value of something that cannot be obtained through market prices (i.e. national parks, beaches, ecosystems). The aim of the method is to calculate willingness to pay for a constant price facility. ==Methodology== * A sample of visitors to the facility are selected * These visitors are split into "zones" depending on their distance travelled to the facility. * The average distance to the facility and the average travel cost to the facility from each zone are calculated. * The visit rate from each zone is calculated. i.e.) Visit rate: The number of visitors from a given zone/The population of that zone * The visit rate is regressed against travel cost in order to create a visit rate curve. Visit rate from given zone = f(cost from given zone) VR=a+b.C * This curve can then be used to obtain estimates of visit rates given differing levels of total costs. * This enables estimates of numbers of visitors from each zone to be made given differing level of facility price. * The sum of the number of visitors from each zone can be plotted/regressed against these differing levels of facility price in order to create a demand curve for the facility. *The area under this demand curve is the willingness to pay for the facility which can be used as a valuation for CBA purposes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Travel cost analysis」の詳細全文を読む スポンサード リンク
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