抄録
This study aims to measure environmental preservation benefit by using not only WTP (willingness to pay) but also WTW (willingness to work) in the context of CVM (contingent valuation method), to evaluate the value of time in the voluntary activity and to show reasonableness of WTP and WTW as the index of environment economic evaluation. As a result, environmental preservation benefit in the coastal area in Japan is 12, 486 yen per person by WTP or 21.37 voluntary days per person by WTW, and the value of time in the voluntary activity is 584.28 yen per day. Now, the value of time seems too low as compared with usual value of time in the recreation activity. This is caused by small value of WTP in one's whole life, where the value is too low in general CVM studies. The result indicates that the index of WTP in the long term has some kind of biast o evaluate benefilto w.
