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Endogenous Separation, Wage Rigidity and the Dynamics of Unemployment

  • Daniel Tortorice


    (Department of Economics, Brandeis University)

This paper shows that the Mortensen-Pissarides (MP) model requires endogenous separation to explain the volatility of unemployment. I estimate a version of the MP model with wage rigidity and permanent shocks to match productivity. The model generates sufficient volatility in unemployment, vacancies, job-finding and job-separation despite relatively low worker outside options. I then re-estimate the model while restricting the separation rate to be constant and show that, even though the estimation procedure finds the best fitting model, the model predicts too little variance in unemployment and too much variance in the job-finding rate. Based on this result I conclude that models of unemployment fluctuations need endogenous separation rates to explain unemployment fluctuations.

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Paper provided by Brandeis University, Department of Economics and International Businesss School in its series Working Papers with number 07.

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Length: 30 pages
Date of creation: Sep 2010
Date of revision:
Handle: RePEc:brd:wpaper:07
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  12. Ch. Pissarides., 2011. "The Unemployment Volatility Puzzle: Is Wage Stickiness the Answer?," VOPROSY ECONOMIKI, N.P. Redaktsiya zhurnala "Voprosy Economiki", vol. 1.
  13. Guido Menzio & Shouyong Shi, 2008. "Efficient Search on the Job and the Business Cycle," Working Papers tecipa-327, University of Toronto, Department of Economics.
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  17. Gary Solon & Ryan Michaels & Michael W. L. Elsby, 2009. "The Ins and Outs of Cyclical Unemployment," American Economic Journal: Macroeconomics, American Economic Association, vol. 1(1), pages 84-110, January.
  18. George A. Akerlof & William R. Dickens & George L. Perry, 1996. "The Macroeconomics of Low Inflation," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 27(1), pages 1-76.
  19. Silva, José Ignacio & Toledo, Manuel, 2009. "Labor Turnover Costs And The Cyclical Behavior Of Vacancies And Unemployment," Macroeconomic Dynamics, Cambridge University Press, vol. 13(S1), pages 76-96, May.
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  23. Anabela Carneiro & Paulo Guimarães & Pedro Portugal, 2012. "Real Wages and the Business Cycle: Accounting for Worker, Firm, and Job Title Heterogeneity," American Economic Journal: Macroeconomics, American Economic Association, vol. 4(2), pages 133-52, April.
  24. Jeremy Tobacman & David Laibson, 2007. "Estimating Discount Functions with Consumption Choices over the Lifecycle," Economics Series Working Papers 341, University of Oxford, Department of Economics.
  25. Shigeru Fujita & Garey Ramey, 2007. "The cyclicality of separation and job finding rates," Working Papers 07-19, Federal Reserve Bank of Philadelphia.
  26. Guido Menzio & Shouyong Shi, 2008. "Efficient Search on the Job and the Business Cycle, Second Version," PIER Working Paper Archive 09-010, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania, revised 28 Feb 2009.
  27. Mark Bils & Yongsung Chang & Sun-Bin Kim, 2011. "Worker Heterogeneity and Endogenous Separations in a Matching Model of Unemployment Fluctuations," American Economic Journal: Macroeconomics, American Economic Association, vol. 3(1), pages 128-54, January.
  28. Pedro S. Martins & Gary Solon & Jonathan P. Thomas, 2012. "Measuring What Employers Do about Entry Wages over the Business Cycle: A New Approach," American Economic Journal: Macroeconomics, American Economic Association, vol. 4(4), pages 36-55, October.
  29. Christopher J. Flinn, 2006. "Minimum Wage Effects on Labor Market Outcomes under Search, Matching, and Endogenous Contact Rates," Econometrica, Econometric Society, vol. 74(4), pages 1013-1062, 07.
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