This dissertation consists of two essays. The first essay is a study of strategic firm competition in a differentiated product environment. We develop a tractable spatial model of oligopolistic competition in which firms endogenously determine both franchise/product locations and prices....

In three chapters I study the formation of social networks, and the impact the structures that arise may have in various economic settings. First, I develop a model of social network formation with heterogeneous agents and incomplete information. The model predicts an equilibrium in which agents...

In the first essay, we analyze the necessary and sufficient conditions for coalitional Bayesian Nash implementation. A mechanism coalitionally implements a social choice set if any outcome of the social choice set can be achieved as a coalitional Bayesian Nash equilibrium of a mechanism and vice...