A Model for Decomposing Use and Non-use Values - The Case of Valuation of Biodiversity in Wetlands -

Abstract

 Measurements on non-use values of environmental qualities are important for decision-making on projects. Non-use values are frequently measured by using stated preference data which may include biases. Thus, there is possibility that measured values on non-use would include other values such as use values. The purpose of this study is to examine a model to decompose use and non-use values by using both the stated and revealed preference data. Data on both trips for wetlands in Hokkaido and willingness to pays for improving biodiversity in the wetlands were used. Results indicated that the use value was about 146 yen per a year and non -use value was about 193 per a year in 339 yen per a year which was measured as the non-use value by using stated preference data only.