We lay a unified foundation for a theory of general equilibrium by proving the existence of an equilibrium for a grand model which covers all the well-known general equilibrium models under the convexity and continuity assumptions. The grand model allows an economy to have an extended list of...

This dissertation consists of two essays.The first essay is a theoretical study of a dynamic game played between the consumers and a monopolistic seller who can use checkout coupons. The paper shows how checkout coupons can increase the profit of a monopolist, when both the seller and the...

This paper relates firm location choice and consumer search. Firms that cluster together attract consumers by facilitating price comparison, but clustering increases the intensity of local competition. I construct a simple model which shows that firms may choose head-on competition by locating...