Measuring the value of windbreak and sand-fixation in the Sandstorm Source Control Project in and around Beijing and Tianjin based on CVM's different inquiry methods

Based on the Contingent Value Method (CVM), this paper uses a telephone interview to random sampling residents in Beijing to survey the annual household's willingness to pay for the value of windbreak and sand-fixation effects in the Sandstorm Source Control Project around the Beijing and Tianjin (Project); at the same time the annual economic value of the Program is calculated. The result of the research shows that in Beijing, with open-ended method, per household's willingness to pay for Project is from 100 to 136.81 CHY (Chinese Yuan) on average; while it's from 110 to 143 CHY with double-bounded dichotomous choice method. According to the WTP of local residents, the evaluated annual value Project is from 611 to 642 million CHY.