question. In this survey that question was : "If no, would you 

 have made the trip if your share of the expenses had been only $1 

 more? Following the "No" response to this question was: "if no, 

 could you briefly explain why not." The responses to these 

 questions were analyzed to develop categories of reasons for 

 responding with a "No". Those hunters who indicated a valid 

 reason for their zero willingness to pay were left in the sample. 

 These valid reasons included: 



* Respondents who could not afford a higher trip cost. 



* Respondents saying they would hunt elsewhere if faced with 

 increased trip costs. 



* Respondents who indicated that the trip would just not 

 be worth any more money. 



A second group of respondents was excluded from the sample 

 because their reasons indicated they were protesting the market 

 setup rather than legitimately considering the question which was 

 asked. These "protest" responses included: 



* Respondents saying they didn't understand the questions. 



* Respondents indicating opposition to any increased taxes, 

 or fees. 



Specification of the Model 



Economic theory suggests that certain independent variables be 

 included in estimated equations. These variables are trips, 

 which in this context is a measure of preference, income, and the 

 amount the respondent is asked to pay. Economic theory also 

 suggests that other variables would influence the probability of 

 a respondent answering "yes" to a CVM question. These variables 

 include other variables measuring the tastes and preferences of 

 the respondent, those measuring the quality of the trip, and 

 those measuring the expectations of the respondents. 



The specification of the logit equation to be estimated is shown 

 in Equation (1). This specification relates the log of the odds 

 of answering yes to a CVM question to a group of explanatory 

 variables chosen by the above economic theory criteria on an a 

 priori basis. 



(1) ln(P/l-P) = BO - Bl In(BID) +B2 In(INCOME) - 

 B3 In(TRIPS) + B4 In(DRSEEN) - B5 In(HUNTERS) 

 + B6 In(YRSHNT) + B7 (PURPOSE) + B8 (DRKILL) 

 + B9 (CLUB) - BIO In (AGE) 



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