This collection of essays grew out of a conference that I organized at
Cornell University in June 1992 to honor Professor Roy Radner on his
sixty-fifth birthday: it is a pleasure to note that some of the distinguished
alumni of Cornell (Professors Beth Allen, Prajit Dutta, James Jordan,
Andrew Schotter, Raghu Sundaram) were able to contribute to this
volume. Generous financial support from the Center for Applied
Mathematics, the Center for Analytic Economics, and the Department
of Economics is gratefully acknowledged. In this context, I am particularly
grateful to David Easley, Don Randel, John Guckenheimer, Karl
Shell, and Tapan Mitra for their encouragement. The success of the conference
owed much to the organizational skills of Ann Stiles.