This paper investigates the idea that people are unsure about the value they place on prospective changes in environmental goods. In particular, we focus on a parametric explanation of the determinants of a "value gap," the difference between the most someone is sure they would pay for an...

Welfare change estimates obtained from discrete-response contingent valuation experiments normally assume a particular distribution of willingness-to-pay (W TP).U sing conventional microeconomic theory, we derive upper and lower bounds on such estimates. These bounds are interpreted...