Agricultural sustainability : economic, environmental, and statistical considerations economicenvir00gop Year: 1995 Origin Popula- tion Distance Visits per capita Estimat- ed visitation C 3,000 30 1 3,000 Total 35,000 Estimated Visitation [Simulated increase in mileage] (3) This estimate of 35,000 yields an initial point on the resource's demand curve. To find sufficient points to determine the entire demand curve, it is necessary to make small incremental increases in the price of participation and to measure the quan- tity of use that would be demanded given these chances. This is equivale
Agricultural sustainability : economic, environmental, and statistical considerations economicenvir00gop Year: 1995 Origin Popula- tion Distance Visits per capita Estimat- ed visitation C 3,000 30 1 3,000 Total 35,000 Estimated Visitation [Simulated increase in mileage] (3) This estimate of 35,000 yields an initial point on the resource's demand curve. To find sufficient points to determine the entire demand curve, it is necessary to make small incremental increases in the price of participation and to measure the quan- tity of use that would be demanded given these chances. This is equivalent to moving the project farther and farther from the potential users, requir- ing them to pay more and more in travel costs. As the simulated distance increases, use decreases, and for each increment in distance a new use esti- mate is computed using either the use estimating model or the per capita use curve. The new use es- timates are the various quantities of recreation that would be demanded at increasing prices. (4) For example, assume that an increment of 10 miles in travel distance is used to simulate an in- crease in cost for the proposed project described above. The use estimate of use would then be: Origin Popula- tion Simulat- ed distance (Actu- al 10) Visits per capita Estimat- ed visitation A 10,000 1,000 3,000 20 30 40 2 1 0 20,000 B 1,000 C 0 Total 21,000 (5) This would be a second point on the re- source's demand curve; the quantity demanded (21,000 visits) at a price equivalent to the travel cost associated with an increment in distance of 10 miles. (A discussion of the proxy for price used to assign a dollar value to this increment is in para- graph (6)(i) of this appendix.) (6) Remaining points on the resource demand curve are then estimated by making continued in- crements in the price (simulated increases in dis- tance) until the anticipated visitation from all areas of origin is zero. In the example above using 10- mile increments, the visitation expecte
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