The dependent variable, In(v), is the natural logarithm of trips (actual or hypothetical) to the Gulkana River by person (i) ubder management condition (j), where j = 1 for actual trip, j = 2 for a hypothetical doubled harvest, j = 3 for a hypothetical doubled daily bag and possession, and j = 4 for a hypothetical season bag limit. The dummy variables (D) are demand shifters which control for the three hypothetical case (D = 1 for all i). The costs for person (i) to travel to site (K) are (TC), where k= 1 is the travel cost dto the Gulkana River, while k = 2, and k = 3, are the travel costs to chinook fishing areas on the Susitna River and Kenai Peninsula, respectively. Other variables specified in the model include annual income, education level, a binary variable for nonreuestion a binary variable to test for differences in response to firstand second survey mailings, and other qualitative variables representing complementary non-fishing activities.