A.B. University of Pennsylvania, 1959
A.M. Princeton University, 1961
Ph.D. Princeton University, 1962
J.D. University of Pennsylvania, 1965
The ancient economy
Money, Labour and Land: Approaches to the Economies of Ancient Greece (2002), co-editor with Paul Cartledge and Lin Foxhall.
The Athenian Nation (2000).
Athenian Economy and Society: A Banking Perspective (1992) .
Ancient Athenian Maritime Courts (1973; rpt. 2005).