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...

We present an empirical estimation of the distribution of WTP for effective speed reduction via implementation of local traffic calming schemes. Random samples are drawn from the populations of households of three villages intersected by main trunk roads with varying through traffic conditions....