Encyclopedia Entry: Reciprocity and Collective Action, in Stephen Durlauf and Lawrence Blume, eds., The New Palgrave Dictionary of Economics, 2nd Edition, forthcoming.

Encyclopedia Entries: Nash Equilibrium and Mixed Strategy, in William Darity, Jr., ed., International Encyclopedia of the Social Sciences, 2nd Edition, November 2007.

Comment: What Can We Learn from Cultural Group Selection and Co-evolutionary Models? (with E. Somanathan), Journal of Economic Behavior and Organization, January 2004.

Book Review: Polycentric Games and Institutions: Readings from the Workshop in Political Theory and Policy Analysis, Journal of Economic Behavior and Organization, December 2003.

Book Review: The Economic Legacy of Hyman Minsky, Volume 1, Financial Keynesianism and Market Instability, Journal of Economic Literature, June 2002.

Book Review: Knowledge, Innovation, and Economy: An Evolutionary Approach, Journal of Economic Behavior and Organization, October 1999.