His areas of interest are health economics, environmental economics, urban economics, and public policy. His work deals with valuation of risks to human health and safety, valuation of urban and environmental amenities, benefit cost analysis and public policy. He has published in journals such as: Journal of Political Economy, American Economic Review, The Economic Journal, Journal of Risk and Uncertainty, Journal of Health Economics, Journal of Environmental Economics and Management, and Journal of Urban Economics. An entry titled “Economics of Value of Life” was published in the International Encyclopedia of the Social & Behavioral Sciences and a chapter titled "Quality of Life" was contributed to the edited volume, A Companion to Urban Economics. He has written books on traffic safety regulation and environmental policy. His work has been published by the Brookings Institution and National Academy of Sciences, and he has received grants from the National Science Foundation, U.S. Environmental Protection Agency, Urban Institute, and Kentucky Cabinet for Natural Resources and Environmental Protection.
Currently he is on sabbatical as a visiting professor at the Centre for Health Economics, Department of Economics at the Stockholm School of Economics. He has been a visiting Fulbright Scholar at the Stockholm School of Economics in Riga, Latvia, a visiting Fulbright Scholar at the Swedish Road and Traffic Research Institute, and visiting scholar at the University of Chicago. He is an associate editor of Review of Economics of the Household, has edited a special issue of Resource and Energy Economics, is an advisory editor of the Journal of Risk and Uncertainty, and has served on editorial boards for Growth and Change and Journal of Environmental Economics and Management, the Board of Directors for the Association of Environmental and Resource Economists, and the Environmental Systems Committee for the Interdisciplinary Certification Program in Environmental Systems at the University of Kentucky. He has served on various committees for the Association of Environmental and Resource Economists, American Society of Health Economists, and the International Health Economics Association. His biography is included in two editions of Who's Who in Economics edited by Mark Blaug.
March 11, 2008