questions for zero-bidders, and use of sample selection models to correct for bias caused by protest behaviour …

Selectivity bias caused by protest responses in Contingent Valuation studies can be detected and corrected by means of … effect of protest responses would cause an upwards bias of the final estimates of WTP. …

the dataset, and, if there is sample selection bias, they lead to biased estimates for the wtp measure. We propose a … survey design, and a sample selection model, that allows taking into account, and correcting, the possible bias due to … sample selection bias. We maintain that even in these circumstances the sample selection model with the protest votes should …

the dataset, and, if there is sample selection bias, they lead to biased estimates for the wtp measure. We propose a … survey design, and a sample selection model, that allows taking into account, and correcting, the possible bias due to … sample selection bias. We maintain that even in these circumstances the sample selection model with the protest votes should …

questions for zero-bidders, and use of sample selection models to correct for bias caused by protest behaviour. …