The dichotomous choice contingent valuation survey format collects inexact information on willingness to pay (WTP), that is, whether WTP is greater or less than the bid price. Sometimes researchers make the precise conjecture that certain respondents have zero WTP using information from...

Wildlife managers must consider the public's preferences for wildlife population levels when determining management policies. In 1996, Maryland farmers, hunters and the general public were surveyed to determine their preferences for increasing, maintaining, or decreasing deer population numbers....