Albert O. Hirschman Professor of Social Science at the Institute for Advanced Study in Princeton, Eric S. Maskin is particularly known for his work on mechanism design and dynamic games. His current research includes comparing different electoral rules, examining the effect of evolution in repeated games, and studying coalition formation. A graduate of Harvard University, where he earned a B.A. and took his Ph.D. in applied mathematics in 1976, he went on to Cambridge University as a research fellow at Jesus College. He joined the economics faculty of the Massachusetts Institute of Technology in 1977 and was promoted to full professor in 1981. In 1985, he accepted a professorship of economics at Harvard. Dr. Maskin was appointed to his present position in 2000. He is concurrently a visiting lecturer in economics at Princeton University with the rank of professor. An honorary fellow of St. John’s College, Cambridge, he has been a visiting overseas fellow there, an overseas fellow at Churchill College, Cambridge, a distinguished visiting scholar at Monash University in Australia, and an honorary professor at Wuhan University in China. He is a fellow and former president of the Econometrics Society and a fellow of the British Academy and of the American Academy of Arts and Sciences. His many other honors include a Guggenheim Fellowship, a Sloan Research Fellowship, the Erik Kempe Award, and Harvard’s Galbraith Teaching Prize. He has been an advisor to the Polish and the British governments and to the Bank of Italy and delivered invited lectures throughout North America as well as in the United Kingdom, Europe, the Middle East, and Asia. Currently editor of Economics Letters and an associate editor of Games and Economic Behavior, Review of Economic Design, the QR Journal of Theoretical Economics, and the International Journal of Game Theory, he also serves an editorial advisor of the Journal of Developing Areas and as an advisory editor of Division of Labor and Transaction Costs and Economics. Dr. Maskin has contributed more than one hundred papers to academic journals or essays to volumes of collected works, and he has edited or co-edited three books, including, most recently, (with András Simonovits) Planning, Strategy, and Transformation, which was published in 2000 by the MIT Press.