We study a global game in which actions are strategic complements over some region and strategic substitutes over another region. An agent's payoff depends on a market fundamental and the actions of other agents. If the degree of congestion is sufficiently large, agents' strategies are...

This paper provides a characterization of the set of dynamic models in which symmetric duopolists have incentives to raise a common cost. The advantage of the dynamic analysis over existing static models is that it extends the conditions (restrictive in static models) under which symmetric cost...

This paper analyzes competition between firms who sell multiple products in the presence of negative externalities. The model involves two networks who each may offer several service classes. Service classes are generated by forming sub-networks differentiated by their congestion levels. The...