Employing a unique and rich data set of water quality attributes in conjunction with detailed household characteristics and trip information, we develop a mixed logit model of recreational lake usage. Our empirical analysis shows that individuals are responsive to the full set of water quality measures used by biologists to identify the impaired status of lakes. WTP estimates are reported based on improvements in these physical measures. This implies that cost benefit analysis based on water quality measures can be used as a direct policy tool. * The authors would like to thank participants in seminars at Resources for the Future, the University of Minnesota, and the Heartland Conference for helpful comments on earlier drafts of this paper. All remaining errors are, of course, our own. Funding for this project was provided by the Iowa Department of Natural Resources and the U.S. Environmental Protection Agency's Science to Achieve Results (STAR) program. Although the research described in the article has been funded in part by the U.S. Environmental Protection Agency's STAR program through grant R830818, it has not been subjected to any EPA review and therefore does not necessarily reflect the views of the Agency, and no official endorsement should be inferred. Valuing Water Quality as a Function of Water Quality Measures AbstractEmploying a unique and rich data set of water quality attributes in conjunction with detailed household characteristics and trip information, we develop a mixed logit model of recreational lake usage. Our empirical analysis shows that individuals are responsive to the full set of water quality measures used by biologists to identify the impaired status of lakes. WTP estimates are reported based on improvements in these physical measures. This implies that cost benefit analysis based on water quality measures can be used as a direct policy tool.

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Individuals often have biased perceptions about their peers' behavior. We use an economic equilibrium analysis to study the role social norms play in substance use decisions. Using a nationally representative dataset, we estimate the effect of misperception about friends' alcohol, smoking, and marijuana use on consumption of these substances by youths in grades 7-12. Overestimation of friend's substance use significantly increases adolescent's own use approximately 1 year later, and the estimated effect is robust across specifications including individual-level fixed effects regression. The effect size is bigger for boys than for girls. The estimates for those who initially underestimated the norm suggest the possibility of a rebound/boomerang effect.

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Creating an information architecture for a bilingual Web site presents particular challenges beyond those that exist for single and multilanguage sites. This article reports work in progress on the development of a contentbased bilingual Web site to facilitate the sharing of resources and information between Speech and Language Therapists. The development of the information architecture is based on a combination of two aspects: an abstract structural analysis of existing bilingual Web designs focusing on the presentation of bilingual material, and a bilingual card-sorting activity conducted with potential users. Issues for bilingual developments are discussed, and some observations are made regarding the use of card-sorting activities.

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