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A Model of Aggregate Demand and Unemployment

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  • Pascal Michaillat
  • Emmanuel Saez

Abstract

We present a static model of aggregate demand and unemployment. The economy has a nonproduced good, a produced good, and labor. Product and labor markets have matching frictions. A general equilibrium is a set of prices, market tightnesses, and quantities such that buyers and sellers optimize given prices and tightnesses, and actual tightnesses equal posted tightnesses. In each frictional market,there is one more variable than equilibrium condition. To close the model, we take all prices as parameters. We obtain the following results: (1) unemployment and unsold production prevail in equilibrium; (2) each market can be slack, efficient, or tight if the price is too high, efficient, or too low; (3) product market tightness and sales are positively correlated under aggregate demand shocks but negatively correlated under aggregate supply shocks; (4) transfers from savers to spenders stimulate aggregate demand, product market tightness, and employment; (5) the government-purchase multiplier is positive when the economy is slack, zero when the economy is efficient,and negative when the economy is tight; (6) with unequal distribution of profits and labor income, a wage increase may stimulate aggregate demand and reduce unemployment.

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Bibliographic Info

Paper provided by Centre for Economic Performance, LSE in its series CEP Discussion Papers with number dp1235.

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Date of creation: Aug 2013
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Handle: RePEc:cep:cepdps:dp1235

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Web page: http://cep.lse.ac.uk/_new/publications/series.asp?prog=CEP

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Keywords: Unemployment; aggregate demand; matching frictions;

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  1. Mortensen, Dale T, 1982. "Property Rights and Efficiency in Mating, Racing, and Related Games," American Economic Review, American Economic Association, vol. 72(5), pages 968-79, December.
  2. Greg Kaplan & Guido Menzio, 2012. "Shopping Externalities and Self-Fulfilling Unemployment Fluctuations," PIER Working Paper Archive 12-048, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania.
  3. Landais, Camille & Michaillat, Pascal & Saez, Emmanuel, 2010. "Optimal Unemployment Insurance over the Business Cycle," CEPR Discussion Papers 8132, C.E.P.R. Discussion Papers.
  4. Moen, Espen R, 1997. "Competitive Search Equilibrium," Journal of Political Economy, University of Chicago Press, vol. 105(2), pages 385-411, April.
  5. Lehmann, Etienne & Van Der Linden, Bruno, 2010. "Search Frictions On Product And Labor Markets: Money In The Matching Function," Macroeconomic Dynamics, Cambridge University Press, vol. 14(01), pages 56-92, February.
  6. Roger E. A. Farmer, 2008. "Aggregate demand and supply," International Journal of Economic Theory, The International Society for Economic Theory, vol. 4(1), pages 77-93.
  7. Pascal Michaillat, 2012. "Do Matching Frictions Explain Unemployment? Not in Bad Times," American Economic Review, American Economic Association, vol. 102(4), pages 1721-50, June.
  8. Valerie A. Ramey, 2011. "Can Government Purchases Stimulate the Economy?," Journal of Economic Literature, American Economic Association, vol. 49(3), pages 673-85, September.
  9. Gauti B. Eggertsson & Paul Krugman, 2012. "Debt, Deleveraging, and the Liquidity Trap: A Fisher-Minsky-Koo Approach," The Quarterly Journal of Economics, Oxford University Press, vol. 127(3), pages 1469-1513.
  10. Ven Der Linden B. & Lehmann E., 2006. "Search Frictions on Product and Labor markets," Working Papers ERMES 0604, ERMES, University Paris 2.
  11. Robert E. Hall, 2008. "General Equilibrium with Customer Relationships: A Dynamic Analysis of Rent-Seeking," 2008 Meeting Papers 312, Society for Economic Dynamics.
  12. Montgomery, James D, 1991. "Equilibrium Wage Dispersion and Interindustry Wage Differentials," The Quarterly Journal of Economics, MIT Press, vol. 106(1), pages 163-79, February.
  13. Diamond, Peter A, 1982. "Wage Determination and Efficiency in Search Equilibrium," Review of Economic Studies, Wiley Blackwell, vol. 49(2), pages 217-27, April.
  14. Benassy, Jean-Pascal, 1993. "Nonclearing Markets: Microeconomic Concepts and Macroeconomic Applications," Journal of Economic Literature, American Economic Association, vol. 31(2), pages 732-61, June.
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Cited by:
  1. Pascal Michaillat & Emmanuel Saez, 2014. "An Economical Business-Cycle Model," NBER Working Papers 19777, National Bureau of Economic Research, Inc.
  2. Camille Landais & Pascal Michaillat & Emmanuel Saez, 2010. "Optimal unemployment insurance over the business cycle," LSE Research Online Documents on Economics 35596, London School of Economics and Political Science, LSE Library.

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