Combined conjoint- travel cost demand model for measuring the impact of erosion and erosion control programs on beach recreation
Empirical model and welfare measures Our analysis involves three steps. First, we estimate a pooled single site recreation demand model using data on the total number of recreation trips during the year as our dependent variable. Our focus in this step is on estimating the coefficient on travel cost which is used in our welfare analysis in step three. Second, we estimate two trip-change equations to predict how the demand for trips shifts with changes in erosion and erosion control programs. These models use the changes in day trips from our contingent behavior questions as dependent variables. Third, we use the quantity changes predicted in the second step and the travel cost coefficient in the first step to compute welfare measures using conventional welfare analytic methods. We use a Poisson regression to estimate the demand function in the first step. 4
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