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Complete Markets, Enforcement Constraints and Intermediation

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Author Info
Arpad Abraham (University of Rochester)
Eva Carceles-Poveda (SUNY at Stony Brook)

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Abstract

Alvarez and Jermann (2000) show that the constrained efficient allocations of endowment economies with complete markets and limited commitment can be decentralized with endogenous borrowing limits on the Arrow securities. In a model with capital accumulation, aggregate risk and competitive intermediaries, we show that such a decentralization is not possible unless one imposes an upper limit on the intermediaries' capital holdings. Since there is no empirical evidence of such restrictions, we also characterize the equilibrium with no capital accumulation constraints. We show that this allocation solves a similar system of equations to the one of the constrained optimal solution, a result which considerably simplifies the equilibrium computation. In addition, capital accumulation is higher in this case, since the intermediaries do not internalize that fact that a higher aggregate capital increases the incentives to default. Finally, this also implies that agents may enjoy a higher welfare in the long run in spite of the fact that this allocation is not constrained efficient

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Paper provided by Society for Computational Economics in its series Computing in Economics and Finance 2006 with number 320.

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Date of creation: 04 Jul 2006
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Handle: RePEc:sce:scecfa:320

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Related research
Keywords: Complete markets Enforcement Constraints Intermediation

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Find related papers by JEL classification:
E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
G12 - Financial Economics - - General Financial Markets - - - Asset Pricing

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