This paper studies a competitive general equilibrium model with default and endogenous collateral constraints. Even though all collateralized contracts are allowed, the possibility and desirability of trade in spot markets (or the equivalent trade in ex ante asset backed securities) creates...

This paper studies the efficiency of competitive equilibria in environments with a moral hazard problem and unobserved states, both with retrading in ex post spot markets. The interaction between private information problems and the possibility of retrade creates an externality, unless...

We apply an intermediation game of Townsend (1983) to analyze trade in an exchange economy through endogenous intermediaries. In this game, each trader has the opportunity to become an intermediary by oering to buy or sell unlimited quantities of the commodities at a certain price vector and for...

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