Senior Fellow, Resources for the Future, 1966 - present.

 

Director, Resources for the Future, Energy and Materials Division, 1984 - 1988.

 

Professional Lecturer, Johns Hopkins University, School of Advanced International Studies, 1983 - 1993.

 

Economist, National Planning Association, 1957 - 1966.

 

Active Duty, U.S. Army, 1955 - 1957.

 

Research Assistant (for several economic research organizations), 1952 - 1955.

 

 

 

Committee on Earth Resources, National Research Council, 1994 - 1997.

 

 

 

Contributing Editor, Environment magazine, 1979 - present.

 

Editorial Committee, Annual Review of Energy, 1975 - 1986.

 

 

"The Role of Renewable Resources in U.S. Electricity Generation: Experience and Prospects." Delivered to the U.S. House of Representatives, Committee on Science, Washington, D.C., February 28, 2001.

 

 

 

Panelist, Cosmos Club Energy Symposium, Washington, D.C., April 28, 2001.

 

Member, National Research Council Panel to Review the U.S. Geological Survey's Energy Resources Program, 1997 - 1999.

 

Member, review team evaluating National Institute for Global Environmental Change, sponsored by U.S. DOE, administered by University of California at Davis, 1997.

 

Organizer, National Research Council Workshop ("Valuing Natural Capital in Planning for Sustainable Development"), Woods Hole, MA, July 1993.

 

Organizer, American Economic Association meeting (sessions on natural resources), Washington, D.C., December 1990.

 

Organizer, AAAS Annual Meeting (Symposium on Climate Change), New Orleans, LA, February 1990.

 

 

 

Lecture on U.S. energy policy, George Mason University, Learning-in-Retirement Institute, May 15, 2001.

 

 

 

Consultant, National Research Council Committee on Valuing Ground Water, 1994 - 1996.