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Welfare Evaluations in Contingent Valuation Experiments with Discrete Response Data: Reply W. Michael Hanemann American Journal of Agricultural Economics, Vol. 71, No. 4 (Nov., 1989), pp. 1057-1061 （2）http://www.jstor.org/pss/3146486
Confidence Intervals for Evaluating Benefits Estimates from Dichotomous Choice Contingent Valuation Studies Timothy Park, John B. Loomis and Michael Creel Land Economics, Vol. 67, No. 1 (Feb., 1991), pp. 64-73 （3）http://www.jstor.org/pss/1243566
A Comparison of Contingent Preference Models John Mackenzie American Journal of Agricultural Economics, Vol. 75, No. 3 (Aug., 1993), pp. 593-603
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Interval Estimates of Non-Market Resource Values from Referendum Contingent Valuation Surveys Trudy Ann Cameron Land Economics, Vol. 67, No. 4 (Nov., 1991), pp. 413-421

（5）http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WJ6-45KV0V8-15&_user=10&_coverDate=02%2F28%2F1997&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=c42f3e0b59b0091728dfaf7a687dc140
Referendum Models and Negative Willingness to Pay: Alternative Solutions

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Journal of Environmental Economics and Management
Volume 32, Issue 2, February 1997, Pages 251-270
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Contingent Valuation When Respondents Are Ambivalent
Journal of Environmental Economics and Management
Volume 29, Issue 2, September 1995, Pages 181-196
（8）http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WJ6-45S92YX-2H&_user=10&_coverDate=03%2F31%2F1995&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=08ee508812a6683bd2319599f2656d8c
Discrete Choice under Preference Uncertainty: An Improved Structural Model for Contingent Valuation
Journal of Environmental Economics and Management
Volume 28, Issue 2, March 1995, Pages 256-269

（9）http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WJ6-45J59W3-F&_user=10&_coverDate=09%2F30%2F1998&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=135c1e2983302b55a9c85ded02ad9321
Elicitation Effects in Contingent Valuation: Comparisons to a Multiple Bounded Discrete Choice Approach
Journal of Environmental Economics and Management
Volume 36, Issue 2, September 1998, Pages 170-185

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A comparison of stated preference methods for environmental valuation
Ecological Economics
Volume 18, Issue 3, September 1996, Pages 243-253