John O. Ledyard

John O. Ledyard is the Allen and Lenabelle Davis Professor of Economics and Social Sciences at the California Institute of Technology (Caltech), where he has been teaching since 1986. He previously held positions at Northwestern University as the Sydney G. Harris Professor of Social Science and at Carnegie Mellon University. At Caltech, he served as Chairman of the Division of the Humanities and Social Sciences from 1992-2002 and is currently Director of both the Social and Information Sciences Laboratory and Interactive Political and Economic Systems (IPES).

• AB in Mathematics from Wabash College (1963)
• MS in Economics from Purdue University (1965)
• PhD in Economics from Purdue University (1967)

Professor Ledyard's research focuses on the theoretical foundations and applications of mechanism design, particularly examining the roles of incentives and information in organizations. His work spans theoretical contributions to incentive-compatible organization and voting system design, as well as applied work in computer-assisted markets for pollution rights trading, logistics contracts, securities portfolios, prediction markets, and advertising time. His current research includes market-based approaches for managing spacecraft design and cap-and-trade systems for sustainable fisheries management. His publications reveal a consistent focus on information aggregation, market efficiency, evolutionary learning models, and neural measures of economic value, demonstrating how economic theory can be applied to solve complex organizational and societal problems.

His scientific honors include being elected as a Fellow of the Econometric Society (1977), Fellow of the American Academy of Arts and Sciences (1999), Fellow of the Public Choice Society (2004), and Fellow of the Society for the Advancement of Economic Theory (2011), along with honorary PhD degrees from Purdue and Indiana Universities. He has served as President of the Public Choice Society and on numerous editorial boards including the Journal of Economic Theory and Journal of Economic Behavior and Organization.

Professor Ledyard has advised numerous PhD students who have gone on to prestigious academic and industry positions, including Robin Hanson at George Mason University, Yan Chen at the University of Michigan, and Anthony Kwasnica at Penn State. His laboratory work through the Social and Information Sciences Laboratory has produced significant experimental research on market design, public goods provision, and organizational mechanisms.