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Inequality in Unemployment Risk and in Wages

  • Josep Pijoan-Mas


  • Hernan Ruffo


  • Claudio Michelacci


Distinguishing between the relative roles of skills and luck in the determination of wages is a main concern for economic policy. Variation in observed characteristics of workers and firms typically account for one third of total variance in wages in the US. Luck, as a result of frictions in the process of job search, might explain some of the remaining proportion, but search models can only fill a tiny part of this gap when calibrated to mean transition rates. The aim of this paper is to highlight the existence of heterogeneity in finding and separation rates and to show its impact on inequality. In particular, we first reassess the role of frictions in wage dispersion by introducing heterogeneity in unemployment risk, both as exogenous fixed heterogeneity and with some duration dependence. Secondly, to endogenize this heterogeneity, we borrow from Ljungqvist and Sargent (1998), extending it to account for endogenous separation, and build a quantitative search model with human capital accumulation. In this context, a job is valuable for the inexperienced worker not only because of the wage but also for the opportunity to accumulate skills. At the same time, the unemployment spell is damaging for an experienced worker not only because of the foregone earnings but also for the loss of human capital that it entails. Thus, reservation wages and transition rates depend on individual labor market histories. We calibrate the model to match the observed heterogeneity in finding and separation rates and show that the implied wage dispersion is almost the residual wage dispersion in the data. Furthermore, when we shock the model to account for the change in human capital accumulation process in the US economy, we are able to explain all of the increase in inequality over the last decades. We conclude that heterogeneity in unemployment risk and the incentives related to human capital accumulation and depreciation are main drivers of frictional wage dispersions.

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Paper provided by Society for Economic Dynamics in its series 2012 Meeting Papers with number 794.

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Date of creation: 2012
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Handle: RePEc:red:sed012:794
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Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA

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  1. Jonathan Heathcote & Fabrizio Perri & Giovanni L. Violante, 2009. "Unequal We Stand: An Empirical Analysis of Economic Inequality in the United States, 1967-2006," NBER Working Papers 15483, National Bureau of Economic Research, Inc.
  2. Dale T. Mortensen & Christopher A. Pissarides, 1993. "Job Creation and Job Destruction in the Theory of Unemployment," CEP Discussion Papers dp0110, Centre for Economic Performance, LSE.
  3. Topel, Robert H, 1991. "Specific Capital, Mobility, and Wages: Wages Rise with Job Seniority," Journal of Political Economy, University of Chicago Press, vol. 99(1), pages 145-76, February.
  4. Pierre Cahuc & Fabien Postel-Vinay & Jean-Marc Robin, 2006. "Wage Bargaining with On-the-Job Search: Theory and Evidence," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) hal-00176090, HAL.
  5. Audra J. Bowlus & Jean-Marc Robin, 2004. "Twenty Years of Rising Inequality in U.S. Lifetime Labour Income Values," Review of Economic Studies, Oxford University Press, vol. 71(3), pages 709-742.
  6. Robert H. Topel, 1997. "Factor Proportions and Relative Wages: The Supply-Side Determinants of Wage Inequality," Journal of Economic Perspectives, American Economic Association, vol. 11(2), pages 55-74, Spring.
  7. Gueorgui Kambourov & Iourii Manovskii, 2000. "Occupational Mobility and Wage Inequality, Second Version," PIER Working Paper Archive 04-026, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania, revised 15 Jun 2004.
  8. Andreas Hornstein & Per Krusell & Giovanni L. Violante, 2007. "Frictional Wage Dispersion in Search Models: A Quantitative Assessment," NBER Working Papers 13674, National Bureau of Economic Research, Inc.
  9. Lars Ljungqvist & Thomas J. Sargent, 1996. "The European Unemployment Dilemma," EUI-RSCAS Working Papers 36, European University Institute (EUI), Robert Schuman Centre of Advanced Studies (RSCAS).
  10. Fabien Postel-Vinay & Jean-Marc Robin, 2002. "Equilibrium wage dispersion with worker and employer heterogeneity," Sciences Po publications info:hdl:2441/dc0ckec3fcb, Sciences Po.
  11. Giovanni L. Violante, 2002. "Technological Acceleration, Skill Transferability, and the Rise in Residual Inequality," The Quarterly Journal of Economics, Oxford University Press, vol. 117(1), pages 297-338.
  12. Jacobson, Louis S & LaLonde, Robert J & Sullivan, Daniel G, 1993. "Earnings Losses of Displaced Workers," American Economic Review, American Economic Association, vol. 83(4), pages 685-709, September.
  13. Eric D. Gould, 2002. "Rising Wage Inequality, Comparative Advantage, and the Growing Importance of General Skills in the United States," Journal of Labor Economics, University of Chicago Press, vol. 20(1), pages 105-147, January.
  14. Giuseppe Moscarini, 2004. "Job-to-job quits and corporate culture," 2004 Meeting Papers 38, Society for Economic Dynamics.
  15. Joseph G. Altonji & Nicolas Williams, 2005. "Do Wages Rise with Job Seniority? A Reassessment," ILR Review, Cornell University, ILR School, vol. 58(3), pages 370-397, April.
  16. Machado, José & Portugal, Pedro & Guimarães, Juliana, 2006. "U.S. Unemployment Duration: Has Long Become Longer or Short Become Shorter?," IZA Discussion Papers 2174, Institute for the Study of Labor (IZA).
  17. Acemoglu, Daron, 1996. "Changes in Unemployment and Wage Inequality: An Alternative Theory and Some Evidence," CEPR Discussion Papers 1459, C.E.P.R. Discussion Papers.
  18. Berg, G.J. & Ours, J.C., 1993. "Unemployment dynamics and duration dependence," Serie Research Memoranda 0022, VU University Amsterdam, Faculty of Economics, Business Administration and Econometrics.
  19. Katz, Lawrence F. & Meyer, Bruce D., 1990. "The impact of the potential duration of unemployment benefits on the duration of unemployment," Journal of Public Economics, Elsevier, vol. 41(1), pages 45-72, February.
  20. Juhn, Chinhui & Murphy, Kevin M & Pierce, Brooks, 1993. "Wage Inequality and the Rise in Returns to Skill," Journal of Political Economy, University of Chicago Press, vol. 101(3), pages 410-42, June.
  21. Gueorgui Kambourov & Iourii Manovskii, 2009. "Occupational Mobility and Wage Inequality," Review of Economic Studies, Oxford University Press, vol. 76(2), pages 731-759.
  22. J. J. McCall, 1970. "Economics of Information and Job Search," The Quarterly Journal of Economics, Oxford University Press, vol. 84(1), pages 113-126.
  23. Eva Nagypal & Zvi Eckstein, 2004. "US Earnings and Employment Dynamics 1961 - 2002: Facts and Interpretation," 2004 Meeting Papers 182, Society for Economic Dynamics.
  24. Katz, Lawrence F. & Autor, David H., 1999. "Changes in the wage structure and earnings inequality," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 3, chapter 26, pages 1463-1555 Elsevier.
  25. Louis S. Jacobson & Robert J. LaLonde & Daniel G. Sullivan, 1993. "Long-term earnings losses of high-seniority displaced workers," Economic Perspectives, Federal Reserve Bank of Chicago, issue Nov, pages 2-20.
  26. Bruce D. Meyer, 1988. "Unemployment Insurance And Unemployment Spells," NBER Working Papers 2546, National Bureau of Economic Research, Inc.
  27. Lucas, Robert Jr. & Prescott, Edward C., 1974. "Equilibrium search and unemployment," Journal of Economic Theory, Elsevier, vol. 7(2), pages 188-209, February.
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