Regarding the respondents’ income, the coecient of variable inc5 was both significant andpositive. This implies that respondents in the group with incomes more than 70000 NTD are morewilling to pay than respondents in the reference group. For education, the coecients of ed4, ed5,and ed6 were all significant and positive. This result suggests that respondents with a College degree, Master’s degree, or Ph.D. are more willing to pay for high welfare products than respondents in the reference group.