Study on the uncertainty influencing factors and the treatment in contingent value method——A case study of Hulunbeier grassland

This research took Hulunbeier grassland as a case to explore the uncertain factors that affect the respondents in Contingent Value Method( CVM). The results show that:( 1) Respondents in the central and western regions were more familiar with the grassland resources,the cognition and view of the grassland were more specific and profound and they could understand more deeply the significance and value of grassland to their lives.( 2) Respondents’ location and their familiarity to Hulunbeier grassland affected respondents uncertainty most significantly; the next were environmental awareness and income.( 3) The average willingness to pay in model Expsure and YES6 is the closest to the willingness to pay in the Real model,indicating that the Expsure and YES6 models minimize the virtual bias of the respondents.