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Equilibrium Bias of Technology

  • Daron Acemoglu

The study of the bias of new technologies is important both as part of the analysis of the nature of technology adoption and the direction of technological change, and to understand the distributional implications of new technologies. In this paper, I analyze the equilibrium bias of technology. I distinguish between the relative bias of technology, which concerns how the marginal product of a factor changes relative to that of another following the introduction of new technology, and the absolute bias, which looks only at the effect of new technology on the marginal product of a factor. The first part of the paper generalizes a number of existing results in the literature regarding the relative bias of technology. In particular, I show that when the menu of technological possibilities only allows for factor-augmenting technologies, the increase in the supply of a factor always induces technological change (or technology adoption) relatively biased towards that factor. This force can be strong enough to make the relative marginal product of a factor increasing in response to an increase in its supply, thus leading to an upward-sloping relative demand curve. However, I also show that the results about relative bias do not generalize when more general menus of technological possibilities are considered. In the second part of the paper, I show that there are much more general results about absolute bias. I prove that under fairly mild assumptions, an increase in the supply of a factor always induces changes in technology that are absolutely biased towards that factor, and these results hold both for small changes and large changes in supplies. Most importantly, I also determine the conditions under which the induced-technology response will be strong enough so that the price (marginal product) of a factor increases in response to an increase in its supply. These conditions correspond to a form of failure of joint concavity of the aggregate production function of the economy in factors and technology. This type of failure of joint concavity is quite possible in economies where equilibrium factor demands and technologies are decided by different agents.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 11845.

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Date of creation: Dec 2005
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Publication status: published as Daron Acemoglu, 2007. "Equilibrium Bias of Technology," Econometrica, Econometric Society, vol. 75(5), pages 1371-1409, 09.
Handle: RePEc:nbr:nberwo:11845
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  1. Romer, Paul M, 1990. "Endogenous Technological Change," Journal of Political Economy, University of Chicago Press, vol. 98(5), pages S71-102, October.
  2. Acemoglu, D., 1997. "Why Do New Technologies Complement Skills? Directed Technical Change and Wage Inequality," Working papers 97-14, Massachusetts Institute of Technology (MIT), Department of Economics.
  3. Partha Dasgupta & Joseph Stiglitz, 1980. "Uncertainty, Industrial Structure, and the Speed of R&D," Bell Journal of Economics, The RAND Corporation, vol. 11(1), pages 1-28, Spring.
  4. David Autor & Lawrence Katz & Alan Krueger, 1997. "Computing Inequality: Have Computers Changed the Labor Market?," Working Papers 756, Princeton University, Department of Economics, Industrial Relations Section..
  5. Gino Gancia, 2003. "Globalization, Divergence and Stagnation," Working Papers 198, Barcelona Graduate School of Economics.
  6. Milgrom, Paul & Shannon, Chris, 1994. "Monotone Comparative Statics," Econometrica, Econometric Society, vol. 62(1), pages 157-80, January.
  7. Reinganum, Jennifer F, 1985. "Innovation and Industry Evolution," The Quarterly Journal of Economics, MIT Press, vol. 100(1), pages 81-99, February.
  8. Nordhaus, William D, 1973. "Some Skeptical Thoughts on the Theory of Induced Innovation," The Quarterly Journal of Economics, MIT Press, vol. 87(2), pages 208-19, May.
  9. Stokey, Nancy L, 1995. "R&D and Economic Growth," Review of Economic Studies, Wiley Blackwell, vol. 62(3), pages 469-89, July.
  10. Daron Acemoglu, 2003. "Patterns of Skill Premia," Review of Economic Studies, Oxford University Press, vol. 70(2), pages 199-230.
  11. Daron Acemoglu, 2002. "Directed Technical Change," Review of Economic Studies, Oxford University Press, vol. 69(4), pages 781-809.
  12. Francesco Caselli & Wilbur John Coleman II, 2006. "The World Technology Frontier," American Economic Review, American Economic Association, vol. 96(3), pages 499-522, June.
  13. Nancy L. Stokey, 1990. "Human Capital, Product Quality, and Growth," Discussion Papers 883, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  14. Lucas, Robert Jr., 1988. "On the mechanics of economic development," Journal of Monetary Economics, Elsevier, vol. 22(1), pages 3-42, July.
  15. Milgrom, Paul & Roberts, John, 1990. "The Economics of Modern Manufacturing: Technology, Strategy, and Organization," American Economic Review, American Economic Association, vol. 80(3), pages 511-28, June.
  16. Milgrom, Paul & Roberts, John, 1996. "The LeChatelier Principle," American Economic Review, American Economic Association, vol. 86(1), pages 173-79, March.
  17. Aghion, P. & Howitt, P., 1989. "A Model Of Growth Through Creative Destruction," UWO Department of Economics Working Papers 8904, University of Western Ontario, Department of Economics.
  18. Vives, Xavier, 1990. "Nash equilibrium with strategic complementarities," Journal of Mathematical Economics, Elsevier, vol. 19(3), pages 305-321.
  19. Michele Boldrin & David K Levine, 2002. "Perfectly Competitive Innovation," Levine's Working Paper Archive 625018000000000192, David K. Levine.
  20. Mathias Thoenig & Thierry Verdier, 2003. "A Theory of Defensive Skill-Biased Innovation and Globalization," American Economic Review, American Economic Association, vol. 93(3), pages 709-728, June.
  21. Roberts, Kevin, 1999. "Rationality and the LeChatelier Principle," Journal of Economic Theory, Elsevier, vol. 87(2), pages 416-428, August.
  22. Roland Benabou, 2004. "Inequality, Technology, and the Social Contract," NBER Working Papers 10371, National Bureau of Economic Research, Inc.
  23. Daron Acemoglu & Fabrizio Zilbotti, 1999. "Productivity Differences," NBER Working Papers 6879, National Bureau of Economic Research, Inc.
  24. Gene M. Grossman & Carl Shapiro, 1985. "Dynamic R&D Competition," NBER Working Papers 1674, National Bureau of Economic Research, Inc.
  25. Daron Acemoglu, 2003. "Labor- And Capital-Augmenting Technical Change," Journal of the European Economic Association, MIT Press, vol. 1(1), pages 1-37, 03.
  26. Aghion, Philippe & Howitt, Peter, 1992. "A Model of Growth Through Creative Destruction," Scholarly Articles 12490578, Harvard University Department of Economics.
  27. John A. James & Jonathan S. Skinner, 1984. "The Resolution of the Labor Scarcity Paradox," NBER Working Papers 1504, National Bureau of Economic Research, Inc.
  28. Charles I. Jones, 2004. "The Shape of Production Function and the Direction of Technical Change," NBER Working Papers 10457, National Bureau of Economic Research, Inc.
  29. Reinganum, Jennifer F., 1981. "Dynamic games of innovation," Journal of Economic Theory, Elsevier, vol. 25(1), pages 21-41, August.
  30. Amir, R., 1991. "Sensitivity analysis of multi-sector optimal economic dynamics," CORE Discussion Papers 1991006, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  31. Emmanuel M. Drandakis & Edmond S. Phelps, 1965. "A Model of Induced Invention, Growth and Distribution," Cowles Foundation Discussion Papers 186, Cowles Foundation for Research in Economics, Yale University.
  32. Duranton, Gilles, 2004. "The economics of production systems: Segmentation and skill-biased change," European Economic Review, Elsevier, vol. 48(2), pages 307-336, April.
  33. Kiley, Michael T, 1999. "The Supply of Skilled Labour and Skill-Biased Technological Progress," Economic Journal, Royal Economic Society, vol. 109(458), pages 708-24, October.
  34. Milgrom, Paul & Roberts, John, 1990. "Rationalizability, Learning, and Equilibrium in Games with Strategic Complementarities," Econometrica, Econometric Society, vol. 58(6), pages 1255-77, November.
  35. Romer, Paul M, 1986. "Increasing Returns and Long-run Growth," Journal of Political Economy, University of Chicago Press, vol. 94(5), pages 1002-37, October.
  36. Katz, Michael L & Shapiro, Carl, 1985. "Network Externalities, Competition, and Compatibility," American Economic Review, American Economic Association, vol. 75(3), pages 424-40, June.
  37. Segerstrom, Paul S & Anant, T C A & Dinopoulos, Elias, 1990. "A Schumpeterian Model of the Product Life Cycle," American Economic Review, American Economic Association, vol. 80(5), pages 1077-91, December.
  38. Williamson,Jeffrey G., 1990. "Coping with City Growth during the British Industrial Revolution," Cambridge Books, Cambridge University Press, number 9780521364805, October.
  39. Joseph Farrell & Garth Saloner, 1985. "Standardization, Compatibility, and Innovation," RAND Journal of Economics, The RAND Corporation, vol. 16(1), pages 70-83, Spring.
  40. Young, Alwyn, 1993. "Invention and Bounded Learning by Doing," Journal of Political Economy, University of Chicago Press, vol. 101(3), pages 443-72, June.
  41. Spence, Michael, 1984. "Cost Reduction, Competition, and Industry Performance," Econometrica, Econometric Society, vol. 52(1), pages 101-21, January.
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