This paper investigates the effects on tacit collusion of increased market transparency on the consumer side of a market in a differentiated Hotelling duopoly. Increasing market transparency increases the benefits to a firm from underbutting the collusive price. It also decreases the punishment...

We consider a general model of dynamic common agency with symmetric information. We focus on Markov perfect equilibria and characterize the equilibrium set for a refinement of the Markov perfect equilibria. Particular attention is given to the existence of a marginal contribution equilibrium...

In this paper, we present a model of implementation where infea- sible allocations are converted into feasible ones through a process of renego- tiation that is represented by a reversion function. We describe the maximal set of Social Choice Correspondences that can be implemented in Nash Equi-...