Assistant Professor, Associate Professor and Professor,
Department of Agricultural and Resource Economics, University
of Maryland, College Park, 1988 to present.
Associate
Dean for Research, Graduate Studies and Research, University
of Maryland, 1987-90.
Assistant
Professor, Department of Resource Economics, University
of Rhode Island, 1976-1980.
Visiting
Professor, Department of Environmental Economics and
Environmental Management, University of York, York,
United Kingdom, 1996.
Visiting
Associate Professor, Department of Agricultural &
Resource Economics, University of California, Berkeley,
1987.
President,
Association of Environmental and Resource Economists,
1999 and 2000.
Editorial
Boards, Journal of Marine Resource Economics, 1984-1990,
Journal of Environmental Economics and Management, 1991-93,
1995-present, Environment and Development Economics,
1994-present, Land Economics, 1997-present.