Harvard University

Visiting Professor, Harvard Law School, 2012–2013; Fall, 2013; Fall, 2014

Princeton University

McCormick Professor of Jurisprudence, 1999–
Director, James Madison Program in American Ideals and Institutions, 2000–
Professor, Department of Politics, 1999–
Associated Faculty Member, Department of Philosophy, 2008–
Associate Professor, Department of Politics, 1993–99
Assistant Professor, Department of Politics, 1986–93
Instructor, Department of Politics, 1985–86

Oxford University

Visiting Fellow in Law, New College, 1988–89
Lecturer in Jurisprudence, New College, 1982–85