ELINOR OSTROM is the Arthur F. Bentley Professor of Political Science and Co-Director of the Workshop in Political Theory and Policy Analysis, and the Center for the Study of Institutions, Population, and Environmental Change, at Indiana University, Bloomington.  She was elected to the National Academy of Sciences and a Fellow of the American Association for the Advancement of Science in 2001, and is a member of the American Academy of Arts and Sciences.  She is a recipient of the Frank E. Seidman Distinguished Award in Political Economy (Rhodes College, Memphis TN) 1997; the Johan Skytte Prize in Political Science (Uppsala University, Sweden) 1999; a Lifetime Achievement Award (Atlas Economic Research Foundation), 2003; and the John J. Carty Award for the Advancement of Science (National Academy of Sciences), 2004. She has been awarded Honorary Doctorates from the University of Zurich (Economics) in1999, and from the Institute of Social Studies, The Hague, in 2002. Her books include Governing the Commons; Rules, Games, and Common-Pool Resources (with Roy Gardner and James Walker); Local Commons and Global Interdependence: Heterogeneity and Cooperation in Two Domains (with Robert Keohane); Trust and Reciprocity: Interdisciplinary Lessons from Experimental Research (with James Walker); The Commons in the New Millennium: Challenges and Adaptations (with Nives Dolšak), and Foundations of Social Capital (with T. K. Ahn).