I conducted a questionnaire to evaluate (a part) of ecosystem services. To ask for respondents' WTP I asked them how much money would they pay more in entrance fee in order to contribute to conservation activity in the area from the choice below:
1. $0
2. < $5
3. $5 - $10
4 >$10
Could I use ordinal logistic regression to deal with the data. Or what should I do I get the mean of WTP to get the consumer surplus from the data? I would appreciate if someone could help me. Thank you in advance