Donald H. Regan, the William W. Bishop Jr. Collegiate Professor of Law, is also a professor of philosophy at the University of Michigan. He teaches and writes on international trade law, particularly core issues such as the national treatment obligation and Article XX of the GATT; moral and political philosophy, with a special interest in the theory of the good; and constitutional law, concentrating on federalism issues. Prof. Regan has been a member of the American Academy of Arts and Sciences since 1998, and has been a Guggenheim Fellow, a fellow at the National Center for the Humanities, and a visiting fellow at All Souls College, Oxford. His book, Utilitarianism and Co-operation, shared the Franklin J. Matchette Prize of the American Philosophical Association for 1979-1980. Prof. Regan is a graduate of Harvard and the University of Virginia Law School. He was also a Rhodes Scholar at Oxford University, where he earned a degree in economics, and he has a PhD in philosophy from the University of Michigan. Prof. Regan began his academic teaching career at Michigan in 1968. He has visited at the University of California, Berkeley, the University of Virginia, and the University of Zagreb. Currently, he is teaching a seminar on "The Philosophy of Free Trade" in the new Master's Program in Law in a European and Global Context at the Catholic University of Portugal (Lisbon).