The economics of fish consumption advisories: insights from revealed and stated preference data.

摘要

This paper examines an alternative joint estimation technique based on an index of stated preference (SP) parameter that was used for estimating the effect of fish consumption advisories on angler behaviour in the Fox River and Green Bay in Wisconsin, USA. A survey was conducted on revealed preference (RP) or actual data on fishing trips from June through September 1998. The survey also collected SP or hypothetical data from July through October 1998. A total of 862 anglers participated in the surveys. The advisory index uses RP data as the base data for modelling angler behaviour, and it supplements the RP data with SP data to create the index. This method preserves the classic economic preference of relying on actual behaviour, but it also recognizes that SP data can enrich and usefully supplement the RP information. Thus, better measures of advisories are developed. Advisories are likely to continue to be an important public policy tool for managing health risks. Travel cost assumptions have a profound impact on the willingness-to-pay to avoid advisories.