Many important phenomena (electoral competition, R&D races, lobbying) are instances of multiple simultaneous contests with unconditional commitment of limited resources. Specifically, the following game is analyzed in the first chapter. Two players compete in a number of simultaneous contests....

This thesis consists of three chapters. In the first chapter, we consider coalition formationgames with externalities. A natural extension of superadditivity is not sufficient to imply that the grand coalition is efficient when externalities are present. We provide a condition, analogous to...

This thesis consists of three essays on game theory.In the first essay we consider an endogenous formation of researchjoint ventures by introducing heterogeneity of the firms. When thefirms are characterized by a one dimensional parameter, we showthat there is a tendency towards similar firms...

Efficient allocation of scarce resources is one of the central themes in economics. The essays in this thesis approach two aspects of this problem. In the first essay I consider the problem of the efficient provision of a public good with congestion in a setting with asymmetric information....

Learning about an underlying uncertainty from observing the actions of other agents is a widespread phenomenon in many social interactions. This thesis looks different aspects of the phenomenon of informational cascades that results due to this social learning. The first essay theoretically...