Dichotomous Choice Contingent Valuation with ‘Dont Know’ Responses and Misreporting
Kelvin Balcombe1,*, Iain Fraser2
Journal of Applied Econometrics
Volume 24, Issue 7, pages 1137–1152,
November/December 2009
http://onlinelibrary.wiley.com/doi/10.1002/jae.1109/abstract