His professional interests include the application of input-output analysis to productivity, energy, and regional economics, evolutionary theory in economics, economic anthropology, and ecological economics. He has authored or edited eight books and published over 80 academic articles. His latest book, co-authored with Carl McDaniel, titled "Paradise for Sale: Markets, Myths, and Ecosystem Destruction", will be published next year by the University of California Press. He is currently working on the topics of trade and limitational factors of production, evolutionary theory and environmental policy, and markets and biodiveristy loss in ocean fisheries.

He is a member of the editorial boards of the journals Ecological Economics, Structural Change and Economic Dynamics, Environmental Ethics, Government and Policy: Environment and Planning C, International Journal of Agricultural Resources, Governance and Ecology and the International Journal of Global Environmental Issues. He was recently (1997) a guest editor of a special issue of Structural Change and Economic Dynamics on the topic of biology and economics. Recent publications include:

"One World, One Experiment: Addressing the Biology-Economics Conflict," Ecological Economics 15, pp. 181-192, December 1995 (with Carl McDaniel).

"The Value of Biodiversity: Markets, Society, and Ecosystems" Land Economics 73(1), February 1997, 25-41. Reprinted in Ecosystems and Nature, R. Kerry Turner, editor, Edward Elgar, London, forthcoming.

"Trade, Equity, and Regional Environmental Sustainability," in Economy and Ecosystems in Change: Analytical and Historical Approaches, Jan van der Straaten and Jeroen van den Bergh, (editors) Edward Elgar, October 1997, 166-184.

"Markets and Biodiversity Loss: Some Case Studies and Policy Considerations," International Journal of Social Economics, 25 (9/10), 1998 (with Carl McDaniel).

"Vertically Integrated Measures of the Rate of Profit in the United States 1950 - 1990," Review of Income and Wealth (with Jack Miller), December 1998.

"The Physical Destruction of Nauru: An Example of Weak Sustainability," Land Economics, 75 (with Carl McDaniel), forthcoming May 1999.

"Resource Use, Institutions and Sustainability: A Tale of Two Pacific Island Cultures," (with Jon Erickson) Land Economics 76(3), 345-354, August 2000.

"Evolutionary Theories in Environmental and Resource Economics: Approaches and Applications," Environmental and Resource Economics 17(1), 37-57 (with Jeroen van den Bergh) September 2000.

"Weak versus Strong Sustainability: Economics, Natural Science and 'Consilience'," (With Robert U. Ayres and Jeroen van den Bergh) Environmental Ethics 23, 2001.

"The Microfoundations of Macroeconomics: An Evolutionary Perspective," Cambridge Journal of Economics (with Jeroen van den Bergh) forthcoming 2001.