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Eliciting willingness to pay : comparing closed-ended with open-ended and payment scale formats
Frew, Emma J., (2003)
Willingness-to-pay and demand curves: a comparison of results obtained using different elicitation formats
Whynes, David K., (2005)
A comparison of two methods for eliciting contingent valuations of colorectal cancer screening
Whynes, David K., (2003)