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Markups, gaps and the welfare costs of business fluctuations

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  • Jordi Galí

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  • Mark Gertler
  • J. David López-Salido

Abstract

In this paper we present a simple theory-based measure of the variations in aggregate economic efficiency: the gap between the marginal product of labor and the household’s consumption/leisure tradeoff. We show that this indicator corresponds to the inverse of the markup of price over social marginal cost, and give some evidence in support of this interpretation. We then show that, with some auxilliary assumptions our gap variable may be used to measure the efficiency costs of business fluctuations. We find that the latter costs are modest on average. However, to the extent the flexible price equilibrium is distorted, the gross efficiency losses from recessions and gains from booms may be large. Indeed, we find that the major recessions involved large efficiency losses. These results hold for reasonable parameterizations of the Frisch elasticity of labor supply, the coefficient of relative risk aversion, and steady state distortions.

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Bibliographic Info

Paper provided by Department of Economics and Business, Universitat Pompeu Fabra in its series Economics Working Papers with number 836.

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Date of creation: May 2005
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Handle: RePEc:upf:upfgen:836

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Web page: http://www.econ.upf.edu/

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Keywords: Business Cycles; Countercyclical Markups; Welfare Costs;

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