Relational Contracts and Competitive Screening (with G.Calzolari, August 2009)

Contracts as Threats (with E.Iossa, June 2009)

Equilibrium Selection in the Repeated Prisoner's Dilemma: Axiomatic Approach and Experimental Evidence (forthcoming in American Economic Journal : Microeconomics, with M.Blonski and P.Ockenfels, October 2010)

Relational Efficient Property Rights (with M.Blonski, new revision February 2007)

Reputational Commitments and Collusion in Procurement (with G.Calzolari, October 2006)

Globalization and Cooperative Relations (May 2005)

Networks of Relations, Word-of-Mouth Comunication (with S.Lippert, new version, forthcoming in Games and Economic Behavior)

Prisoners' Other Dilemma (with M.Blonski, September 2002)

Markets and Cooperation (December 1999)

On Interdependent Supergames: Multimarket Contact, Concavity, and Collusion (Journal of Economic Theory, 89 1999)

Social relations and cooperation in organizations (Journal of Economic Behavior & Organization, 38)