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Individual Travel Cost Method: Estimation and Benefit Assessment with a Discrete and Possibly Grouped Dependent Variable
Ian M. Dobbs
American Journal of Agricultural Economics
Vol. 75, No. 1 (Feb., 1993), pp. 84-94
Stable URL: http://www.jstor.org/stable/1242956
Page Count: 11
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The trip/visit variable in the individual travel cost method is often regarded as discrete. Furthermore, it is often reported in surveys as a grouped variable (the number of visits reported falling into one of several classes). This paper develops a travel cost model which takes account of discreteness and grouping in both demand and benefit estimation. A case study and associated simulations are then reported which indicate the potential extent of bias that may arise from ignoring discreteness/grouping in demand and benefit estimation. The information loss involved in varying the size of visit classes is also examined.
American Journal of Agricultural Economics © 1993 Agricultural & Applied Economics Association