This paper studies collusion in repeated auctions when bidders communicate prior to each stage auction. The paper presents a folk theorem for independent and correlated private signals and general interdependent values. Specifically, it identifies conditions under which an equilibrium collusion...

This paper examines the effectiveness of cheap talk advice in recurrent relationships between a customer, and multiple experts who provide professional services with differentiated specialties. Specifically, the sustainable honesty level is characterized in relation to the degree of rivalry...