Bachelor, American University, Washington, 1969. Master of Arts, American University, 1970. Master of Science, University Michigan, 1975.
Doctor of Philosophy, University Michigan, 1977.
Assistant professor University New Hampshire, Durham, 1973. Senior research associate Resources Future, Washington, 1973—1978. Associate director Pacific Northwest Forest Policy Project, Vancouver, Washington, 1978—1979.
Associate professor Duke University, Durham, 1979—1988. President Natural Resources Management. Branch chief Economic Research Service, Washington, 1988—1993.
Head forestry department Virginia Polytechnic Institute, 1993—1995. Editor Forest Science, 1992—1995. Associate editor Journal Environmental Economics Management, 1991—1994, Silva Fennica, since 1994.
Lieutenant United States Army, 1964-1968.
Member of American Agricultural Economics Association, Society Risk Analysis, Association Environmental and Resource Economists, Association Public Policy Analysis and Management, Society of America Foresters, American Economic Association, Phi Kappa Phi, Sigma Xi.
Married Dolores Tiongco, December 30, 1989.