Assistant to manager City of Dayton, Ohio, 1968-1970, Township of Mount Lebanon, Pennsylvania, 1970-1972. Research associate Cornell University, Ithaca, New York, 1976-1980. Professor University Philippines, Diliman, 1976-1981.
Project director Robert Wood Johnson Foundation, Gainesville, Florida, 1982-1984. Professor University Florida, 1984-1990, University Missouri, Kansas City, 1990—2002. Chair Health Care Policy and Research Mayo Clinic, Rochester, Minnesota, since 2002.
Consultant United States Agency for International Development, Manila, 1976-1982, Rockefeller Foundation, Manila, 1974-1978. Consultant, grant director Ford Foundation, Manila, 1976-1980. Methodology consultant United States Department of Health and Human Services, Washington, 1990-1996.
Member Friends of Art, Kansas City, Americans for Democratic Action, Washington. Director health services research Missouri Association for Social Welfare, Jefferson City, Missouri. Fellow Philippine Economic Society (life), American Public Health Association, Academy Health, Society for Epidemiologic Research, American Political Science Association (section chair), American Economic Association, American Society for Public Administration.