We develop a model that encompasses both the incomplete contracts that are used in practice and the idealized complete contracts that address all contingencies. The objectives of the paper are to (i) examine the extent of the inefficiency caused by the constraint of contractual incompleteness;...

Limited observability is the assumption that economic agents can only observe a finite amount of information. Given this constraint, contracts among agents are necessarily finite and incomplete in comparison to the ideal complete contract that we model as infinite in detail. We consider the...

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...