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....

This is a study of market organization in very different settings.In the first chapter, I study how the choices by students to “rush” fraternities, and those of fraternities of whom to admit, interact with the signals that firms receive about student productivities to determine labor market...

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...