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

Contracts as Threats (with Elisabetta Iossa, June 2009)

Fines, Leniency and Rewards in Antitrust: an Experiment (with M. Bigoni, S. Fridolfsson, C. Le Coq, August 2009)

Risk Aversion, Prospect Theory, and Strategic Risk in LawEnforcement: Evidence From an Antitrust Experiment (with M. Bigoni, S. Fridolfsson, C. Le Coq, February 2008)

Equilibrium Selection in the Repeated Prisoner's Dilemma: Axiomatic Approach and Experimental Device (with Matthias Blonski and Peter Ockenfels, August 2009)

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

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

Globalization and Cooperative Relations (May 2005)

Networks of Relations, Word-of-Mouth Comunication, and Social Capital (with Steffen Lippert, May 2005)

Prisoners' Other Dilemma (with Matthias Blonski, September 2002)

Markets and Cooperation (December 1999)

On Interdependent Supergames: Multimarket Contact, Concavity, and Collusion (Journal of Economic Theory 89, pages 127-139 1999)

Social relations and cooperation in organizations (Journal of Economic Behavior & OrganizationVol. 38, pages 1-25, 1999 )