The marginal effects are shown in Table 5. It can be seen that males are more likely to have lowerWTP compared to females. The probability that categories specify very strong, strong, and moderategroups both diminish. However, the probabilities for weak and very weak groups increase. This result implies that, in general, female respondents have a higher likelihood of willingness to pay more. For age, the marginal impact of age5 was negative for very weak WTP and weak WTP. Themarginal effects were positive for modest, strong, and very strong WTP. This implies that respondents aged between 55 and 65 years had a higher probability of modest, strong, and very strong WTP compared with those in the reference group.