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Measuring values of extra~Market goods: Are indirect measures biased?. Bishop R C,T A Heberlein. American Journal of Agricultural Economics . 1979
[3]
Recreation planning as an economic problem. Davis R K. Natural Resources Journal . 1963
[4]
Measuring the total economic value of restoring ecosystem services in an impaired river basin: results from a contingent valuation survey. Loomis J B,Kent P,Strange L,et al. Ecological Economics . 2000
[5]
Welfare evaluations in contingent valuation experiments with discrete responses. Hanemann W M. American J ournal of Agricultural Economics . 1984
[6]
OLS versus ML estimation of non-market resource values with payment card interval data. Cameron T A,D D Huppert. J ournal of Environmental Economics and Management . 1989
[7]
Fairness in the contingent valuation of environmental public goods:attitude toward paying for environmental improvements at two level of scope. Jorgensen B S,Wilson M A,Heberlein T A. Ecological Economics . 2001
[8]
Determination of optimal capacity of resource —— based recreation facilities. Anthony F,Krutilla J. Natural Resources Journal . 1972
[9]
Measuring the economic benefits of removing dams and restoring the elwha river: results of a contingent valuation survey. Loomis J B. Water Resources . 1996