Halstead, John M.; Luloff, A.E.; Stevens, Thomas H. - In: Northeastern Journal of Agricultural and Resource Economics 21 (1992) 2
Protest bids are often excluded during analysis of contingent valuation method data. It is suggested that this procedure might introduce significant bias. Protest bids are often registered by respondents who may actually place a higher- or lower-than-average value on the commodity in question...