Individuals are widely believed to overstate their economic valuation of a good by a factor of two or three. This paper reports the results of a meta-analysis of hypothetical bias in 28 stated preference valuation studies that report monetary willingness-to-pay and that used the same mechanism...

Estimated total value for recreational shellfishing on Cape Cod was $7.4 million in 2002, based on results of a survey of 233 shellfish permit holders, a figure that has roughly kept pace with inflation based on a similar study conducted in 1975. The total value is made up of two components, the...