CVMによる沖縄県民の赤土流出防止対策費用負担意思額の推定

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  • Evaluation by Contingent Valuation Method of Willingness-To-Pay for Red Soil Erosion Prevention in Okinawa
  • CVM ニ ヨル オキナワ ケンミン ノ アカツチ リュウシュツ ボウシ タイサク ヒヨウ フタン イシガク ノ スイテイ

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The purpose of this paper is to evaluate the feasibility of financial supports of the red soil erosion prevention policy through local taxation in Okinawa Prefecture. The double-bounded dichotomous choice method was employed to evaluate the local willingness-to-pay for the prevention of red soil erosions. Through the survey, we evaluated the median willingness-to-pay (medianWTP) for the local taxation to compensate prevention cost at as much as 1,621 yen a year per household. Total willingness-to-pay (TWTP) can be obtained by aggregating individual WTPs. The estimated TWTP was 806 million yen per year. This paper also estimates the red soil erosion prevention cost as follows, 1) 523 million yen per year for the buffer area method, 2) 470 million yen per year for the straw rolls method, and 3) 1,200 million yen per year for the mulching method. As a result, both the buffer area and the straw rolls methods were evaluated to be within TWTP while mulching method beyond TWTP.

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