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Skills, Tasks and Technologies: Implications for Employment and Earnings

Listed author(s):
  • Acemoglu, Daron
  • Autor, David

A central organizing framework of the voluminous recent literature studying changes in the returns to skills and the evolution of earnings inequality is what we refer to as the canonical model, which elegantly and powerfully operationalizes the supply and demand for skills by assuming two distinct skill groups that perform two different and imperfectly substitutable tasks or produce two imperfectly substitutable goods. Technology is assumed to take a factor-augmenting form, which, by complementing either high or low skill workers, can generate skill biased demand shifts. In this paper, we argue that despite its notable successes, the canonical model is largely silent on a number of central empirical developments of the last three decades, including: (1) significant declines in real wages of low skill workers, particularly low skill males; (2) non-monotone changes in wages at different parts of the earnings distribution during different decades; (3) broad-based increases in employment in high skill and low skill occupations relative to middle skilled occupations (i.e., job "polarization"); (4) rapid diffusion of new technologies that directly substitute capital for labor in tasks previously performed by moderately skilled workers; and (5) expanding offshoring in opportunities, enabled by technology, which allow foreign labor to substitute for domestic workers specific tasks. Motivated by these patterns, we argue that it is valuable to consider a richer framework for analyzing how recent changes in the earnings and employment distribution in the United States and other advanced economies are shaped by the interactions among worker skills, job tasks, evolving technologies, and shifting trading opportunities. We propose a tractable task-based model in which the assignment of skills to tasks is endogenous and technical change may involve the substitution of machines for certain tasks previously performed by labor. We further consider how the evolution of technology in this task-based setting may be endogenized. We show how such a framework can be used to interpret several central recent trends, and we also suggest further directions for empirical exploration.

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This chapter was published in:
  • O. Ashenfelter & D. Card (ed.), 2011. "Handbook of Labor Economics," Handbook of Labor Economics, Elsevier, edition 1, volume 4, number 5.
  • This item is provided by Elsevier in its series Handbook of Labor Economics with number 5-12.
    Handle: RePEc:eee:labchp:5-12
    Contact details of provider: Web page: http://www.elsevier.com/wps/find/bookseriesdescription.cws_home/BS_HE/description

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    1. Zeira, Joseph, 1995. "Workers, Machines and Economic Growth," CEPR Discussion Papers 1139, C.E.P.R. Discussion Papers.
    2. Hellwig, Martin & Irmen, Andreas, 1999. "Endogenous technical change in a competitive economy," Papers 99-53, Sonderforschungsbreich 504.
    3. Sattinger, Michael, 1975. "Comparative Advantage and the Distributions of Earnings and Abilities," Econometrica, Econometric Society, vol. 43(3), pages 455-468, May.
    4. Saint-Paul, Gilles, 1999. "On the Distribution of Income and Worker Assignment under Intra-Firm Spillovers, with an Application to Ideas And Networks," CEPR Discussion Papers 2290, C.E.P.R. Discussion Papers.
    5. Thomas Lemieux, 2006. "Post-Secondary Education and Increasing Wage Inequality," NBER Working Papers 12077, National Bureau of Economic Research, Inc.
    6. Barry T. Hirsch & Edward J. Schumacher, 2004. "Match Bias in Wage Gap Estimates Due to Earnings Imputation," Journal of Labor Economics, University of Chicago Press, vol. 22(3), pages 689-722, July.
    7. Teulings, Coen N, 1995. "The Wage Distribution in a Model of the Assignment of Skills to Jobs," Journal of Political Economy, University of Chicago Press, vol. 103(2), pages 280-315, April.
    8. Moretti, Enrico, 2008. "Real Wage Inequality," IZA Discussion Papers 3706, Institute for the Study of Labor (IZA).
    9. Daron Acemoglu, 2010. "When Does Labor Scarcity Encourage Innovation?," Journal of Political Economy, University of Chicago Press, vol. 118(6), pages 1037-1078.
    10. 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 410-442, June.
    11. Daniel S. Hamermesh, 1999. "Changing Inequality in Markets for Workplace Amenities," The Quarterly Journal of Economics, Oxford University Press, vol. 114(4), pages 1085-1123.
    12. David Autor & Lawrence Katz & Alan B. Krueger, 1997. "Computing Inequality: Have Computers Changed the Labor Market?," Working Papers 756, Princeton University, Department of Economics, Industrial Relations Section..
    13. Wilson, Charles A, 1980. "On the General Structure of Ricardian Models with a Continuum of Goods: Applications to Growth, Tariff Theory, and Technical Change," Econometrica, Econometric Society, vol. 48(7), pages 1675-1702, November.
    14. Antonczyk, Dirk & DeLeire, Thomas & Fitzenberger, Bernd, 2010. "Polarization and rising wage inequality: comparing the U.S. and Germany," ZEW Discussion Papers 10-015, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
    15. Nordhaus, William D., 2007. "Two Centuries of Productivity Growth in Computing," The Journal of Economic History, Cambridge University Press, vol. 67(01), pages 128-159, March.
    16. Francesca Mazzolari & Giuseppe Ragusa, 2013. "Spillovers from High-Skill Consumption to Low-Skill Labor Markets," The Review of Economics and Statistics, MIT Press, vol. 95(1), pages 74-86, March.
    17. L. Rachel Ngai & Christopher Pissarides, 2004. "Structural change in a multi-sector model of growth," LSE Research Online Documents on Economics 3550, London School of Economics and Political Science, LSE Library.
    18. James J. Heckman & Lance Lochner & Christopher Taber, 1998. "Explaining Rising Wage Inequality: Explorations with a Dynamic General Equilibrium Model of Labor Earnings with Heterogeneous Agents," NBER Working Papers 6384, National Bureau of Economic Research, Inc.
    19. David H. Autor & Michael J. Handel, 2009. "Putting Tasks to the Test: Human Capital, Job Tasks and Wages," NBER Working Papers 15116, National Bureau of Economic Research, Inc.
    20. Guy Michaels & Ashwini Natraj & John Van Reenen, 2014. "Has ICT polarized skill demand? Evidence from eleven countries over 25 years," LSE Research Online Documents on Economics 46830, London School of Economics and Political Science, LSE Library.
    21. Alexandra Spitz-Oener, 2006. "Technical Change, Job Tasks, and Rising Educational Demands: Looking outside the Wage Structure," Journal of Labor Economics, University of Chicago Press, vol. 24(2), pages 235-270, April.
    22. Acemoglu, D., 1996. "Changes in Unemployment and Wage Inequality: An Alternative Theory and Some Evidence," Working papers 96-15, Massachusetts Institute of Technology (MIT), Department of Economics.
    23. Dornbusch, Rudiger & Fischer, Stanley & Samuelson, Paul A, 1977. "Comparative Advantage, Trade, and Payments in a Ricardian Model with a Continuum of Goods," American Economic Review, American Economic Association, vol. 67(5), pages 823-839, December.
    24. Heckman, James J & Sedlacek, Guilherme, 1985. "Heterogeneity, Aggregation, and Market Wage Functions: An Empirical Model of Self-selection in the Labor Market," Journal of Political Economy, University of Chicago Press, vol. 93(6), pages 1077-1125, December.
    25. Gene M. Grossman & Esteban Rossi-Hansberg, 2008. "Trading Tasks: A Simple Theory of Offshoring," American Economic Review, American Economic Association, vol. 98(5), pages 1978-1997, December.
    26. Maarten Goos & Alan Manning, 2003. "Lousy and Lovely Jobs: the Rising Polarization of Work in Britain," CEP Discussion Papers dp0604, Centre for Economic Performance, LSE.
    27. Sherwin Rosen, 1982. "Authority, Control, and the Distribution of Earnings," Bell Journal of Economics, The RAND Corporation, vol. 13(2), pages 311-323, Autumn.
    28. repec:rim:rimwps:34-08 is not listed on IDEAS
    29. Claudia Goldin & Robert A. Margo, 1991. "The Great Compression: The Wage Structure in the United States at Mid- Century," NBER Working Papers 3817, National Bureau of Economic Research, Inc.
    30. Dan A. Black & Natalia A. Kolesnikova & Lowell J. Taylor, 2007. "Earnings functions when wages and prices vary by location," Working Papers 2007-031, Federal Reserve Bank of St. Louis.
    31. David H. Autor & Frank Levy & Richard J. Murnane, 2003. "The Skill Content of Recent Technological Change: An Empirical Exploration," The Quarterly Journal of Economics, Oxford University Press, vol. 118(4), pages 1279-1333.
    32. Weiss, Matthias, 2008. "Skill-biased technological change: Is there hope for the unskilled?," Economics Letters, Elsevier, vol. 100(3), pages 439-441, September.
    33. David S. Lee, 1999. "Wage Inequality in the United States During the 1980s: Rising Dispersion or Falling Minimum Wage?," The Quarterly Journal of Economics, Oxford University Press, vol. 114(3), pages 977-1023.
    34. David Card & John E. DiNardo, 2002. "Skill Biased Technological Change and Rising Wage Inequality: Some Problems and Puzzles," NBER Working Papers 8769, National Bureau of Economic Research, Inc.
    35. Timothy F. Bresnahan, 1997. "Computerization and Wage Dispersion: An Analytical Reinterpretation," Working Papers 97031, Stanford University, Department of Economics.
    36. Fitzenberger, Bernd & Kohn, Karsten, 2006. "Skill wage premia, employment, and cohort effects: are workers in Germany all of the same type?," ZEW Discussion Papers 06-44, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
    37. Brahim Boudarbat & Thomas Lemieux & W. Craig Riddell, 2010. "The Evolution of the Returns to Human Capital in Canada, 1980-2005," Canadian Public Policy, University of Toronto Press, vol. 36(1), pages 63-89, March.
    38. Tinbergen, Jan, 1974. "Substitution of Graduate by Other Labour," Kyklos, Wiley Blackwell, vol. 27(2), pages 217-226.
    39. Chinhui Juhn, 1994. "Wage Inequality and Industrial Change: Evidence from Five Decades," NBER Working Papers 4684, National Bureau of Economic Research, Inc.
    40. Natalia Ramondo & Andrés Rodríguez-Clare, 2010. "Growth, Size, and Openness: A Quantitative Approach," American Economic Review, American Economic Association, vol. 100(2), pages 62-67, May.
    41. Coen N. Teulings, 2003. "The contribution of minimum wages to increasing wage inequality," Economic Journal, Royal Economic Society, vol. 113(490), pages 801-833, October.
    42. Blau, Francine D & Kahn, Lawrence M, 1997. "Swimming Upstream: Trends in the Gender Wage Differential in 1980s," Journal of Labor Economics, University of Chicago Press, vol. 15(1), pages 1-42, January.
    43. Chinhui Juhn & Kevin M. Murphy & Robert H. Topel, 1991. "Why Has the Natural Rate of Unemployment Increased over Time?," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 22(2), pages 75-142.
    44. David H. Autor & Frank Levy & Richard J. Murnane, 2002. "Upstairs, Downstairs: Computers and Skills on Two Floors of a Large Bank," ILR Review, Cornell University, ILR School, vol. 55(3), pages 432-447, April.
    45. Mokyr, Joel, 1992. "The Lever of Riches: Technological Creativity and Economic Progress," OUP Catalogue, Oxford University Press, number 9780195074772, December.
    46. Alan Manning, 2004. "We Can Work It Out: The Impact of Technological Change on the Demand for Low-Skill Workers," Scottish Journal of Political Economy, Scottish Economic Society, vol. 51(5), pages 581-608, November.
    47. Maarten Goos & Alan Manning, 2003. "Lousy and lovely jobs: the rising polarization of work in Britain," LSE Research Online Documents on Economics 20002, London School of Economics and Political Science, LSE Library.
    48. Alan Manning, 2004. "We Can Work It Out: the Impact of Technological Change on the Demand for Low Skill Workers," CEP Discussion Papers dp0640, Centre for Economic Performance, LSE.
    49. Sattinger, Michael, 1993. "Assignment Models of the Distribution of Earnings," Journal of Economic Literature, American Economic Association, vol. 31(2), pages 831-880, June.
    50. Kremer, M & Maskin, E, 1996. "Wage Inequality and Segregation by Skill," Working papers 96-23, Massachusetts Institute of Technology (MIT), Department of Economics.
    51. Gathmann, Christina & Schönberg, Uta, 2006. "How General Is Specific Human Capital?," IZA Discussion Papers 2485, Institute for the Study of Labor (IZA).
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