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Semi-Nonparametric Distribution-Free Dichotomous Choice Contingent Valuation.
Creel, M., (1995)
Vertically summing public good demand curves : an empirical comparison of economic versus political jurisdections
Loomis, John B., (2000)
Two valuation questions in one survey : is it a recipe for sequencing and instrument context effects?
Cullen, Kelly L., (1999)