Fellow, the American Academy of Arts and Sciences; Guggenheim fellow, 1971-72; and Fulbright senior scholar, 1987.
Chief Reporter, American Law Institute, Principles of Corporate Governance; Inaugural holder of the American Law Institute's R. Ammi Cutter Chair, 1991-1993.
Publications include: The Structure of the Corporation (1976); The Nature of the Common Law (1988); Cases and Materials on Corporations and Other Business Organizations (8th ed., 2000); Basic Contract Law (with L. Fuller, 7th ed., 2001); and numerous articles on corporations, contracts, and legal theory.