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When Borch's Theorem Does Not Apply: Some Key Implications of Market Incompleteness, with Policy Relevance Today

When Borch's Theorem Does Not Apply: Some Key Implications of Market Incompleteness, with Policy... Markets are incomplete when the assets available to the agents do not span the space of future contingencies. In that case, competitive equilibria on the markets for assets and commodities fail (generically) to be constrained efficient. Pareto‐superior allocations can be implemented through price/wage rigidities and quantity constraints. However, nominal rigidities are conducive to multiple equilibria, implying endogenous macroeconomic uncertainties that compound the primitive (exogenous) uncertainties. This paper defines a temporary general equilibrium for which there exists a set of equilibria defining an inflation – unemployment locus. Various policy implications are drawn, with relevance to the current crisis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Scandinavian Journal of Economics Wiley

When Borch's Theorem Does Not Apply: Some Key Implications of Market Incompleteness, with Policy Relevance Today

The Scandinavian Journal of Economics , Volume 118 (4) – Oct 1, 2016

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References (130)

Publisher
Wiley
Copyright
© The editors of The Scandinavian Journal of Economics.
ISSN
0347-0520
eISSN
1467-9442
DOI
10.1111/sjoe.12162
Publisher site
See Article on Publisher Site

Abstract

Markets are incomplete when the assets available to the agents do not span the space of future contingencies. In that case, competitive equilibria on the markets for assets and commodities fail (generically) to be constrained efficient. Pareto‐superior allocations can be implemented through price/wage rigidities and quantity constraints. However, nominal rigidities are conducive to multiple equilibria, implying endogenous macroeconomic uncertainties that compound the primitive (exogenous) uncertainties. This paper defines a temporary general equilibrium for which there exists a set of equilibria defining an inflation – unemployment locus. Various policy implications are drawn, with relevance to the current crisis.

Journal

The Scandinavian Journal of EconomicsWiley

Published: Oct 1, 2016

Keywords: ; ; ; ; ; ; ;

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