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Productivity, seniority and wages: new evidence from personnel data

  • Flabbi, Luca
  • Ichino, Andrea

Wages may be observed to increase with seniority because of firm-specific human capital accumulation or because of self-selection of better workers in longer jobs. In both these cases the upward sloping wage profile in cross sectional regressions would reflect higher productivity of more senior workers. If this were true, the observation of an effect of seniority on wages would depend on the presence of controls for individual productivity. In this paper we replicate, using personnel data from a large Italian firm, the results of the pioneering work of Medoff and Abraham (1980 and 1981) in which supervisors' evaluations were used as productivity indicators. Since the validity of supervisors' evaluations as measures of productivity has been widely criticised, we extend the work of Medoff and Abraham using different direct measures of productivity based on recorded absenteeism and misconduct episodes. Both these indicators and supervisors' evaluation suggest that the observed effect of seniority on wages does not reflect a higher productivity of more senior workers. Theories in which wages are deferred for incentive or insurance reasons are therefore more likely to explain the observed upward sloping profile.

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Article provided by Elsevier in its journal Labour Economics.

Volume (Year): 8 (2001)
Issue (Month): 3 (June)
Pages: 359-387

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Handle: RePEc:eee:labeco:v:8:y:2001:i:3:p:359-387
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  1. Ichino, Andrea & Polo, Michele & Rettore, Enrico, 2003. "Are judges biased by labor market conditions?," European Economic Review, Elsevier, vol. 47(5), pages 913-944, October.
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  3. Christopher Erickson & Andrea Ichino, 1995. "Wage Differentials in Italy: Market Forces, Institutions, and Inflation," NBER Chapters, in: Differences and Changes in Wage Structures, pages 265-306 National Bureau of Economic Research, Inc.
  4. Carmichael, H Lorne, 1989. "Self-Enforcing Contracts, Shirking, and Life Cycle Incentives," Journal of Economic Perspectives, American Economic Association, vol. 3(4), pages 65-83, Fall.
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  8. Jacob Mincer & Boyan Jovanovic, 1981. "Labor Mobility and Wages," NBER Chapters, in: Studies in Labor Markets, pages 21-64 National Bureau of Economic Research, Inc.
  9. Joseph G. Altonji & Nicolas Williams, 2005. "Do wages rise with job seniority? A reassessment," Industrial and Labor Relations Review, ILR Review, Cornell University, ILR School, vol. 58(3), pages 370-397, April.
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  17. Robert Gibbons, 1996. "Incentives and Careers in Organizations," NBER Working Papers 5705, National Bureau of Economic Research, Inc.
  18. Felli, Leonardo & Harris, Christopher, 1996. "Learning, Wage Dynamics, and Firm-Specific Human Capital," Journal of Political Economy, University of Chicago Press, vol. 104(4), pages 838-68, August.
  19. Bishop, John, 1987. "The Recognition and Reward of Employee Performance," Journal of Labor Economics, University of Chicago Press, vol. 5(4), pages S36-56, October.
  20. Baker, George & Gibbs, Michael & Holmstrom, Bengt, 1994. "The Internal Economics of the Firm: Evidence from Personnel Data," The Quarterly Journal of Economics, MIT Press, vol. 109(4), pages 881-919, November.
  21. Booth, Alison L & Frank, Jeff, 1994. "Seniority, Earnings and Unions," CEPR Discussion Papers 1007, C.E.P.R. Discussion Papers.
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