When modelling data generated from a discrete choice contingent valuation question, the treatment of zero bids affects the welfare estimates. Zero bids may come from respondents who are not interested in the provision of the public good; alternatively, some zero-bidders may be protesting about...

The paper reports the results of three stated preference surveys in urban-rural areas in Northern England. The objective is that of valuing the economic benefits from traffic calming schemes in two areas with different traffic problems from stated preference observations. Both choice-experiments...