Bachelor, Wesleyan University, 1976. Doctor of Philosophy, Yale University, 1990.
Research assistant National Academy Public Administration, Washington, 1980. Research associate Urban Institute, 1981-1994. Program associate director, program director Aspen Institute, since 1994.
Member Association for Research on Nonprofit Organizations and Volunteer Action (board directors since 1997), National Council Nonprofit Association (board directors since 1999), American Political Science Association.