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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
Date of revision:
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. Acemoglu, Daron & Zilibotti, Fabrizio, 1998. "Productivity Differences," Seminar Papers 660, Stockholm University, Institute for International Economic Studies.
  2. Milgrom, Paul & Roberts, John, 1990. "Rationalizability, Learning, and Equilibrium in Games with Strategic Complementarities," Econometrica, Econometric Society, vol. 58(6), pages 1255-77, November.
  3. Gino Gancia, 2015. "Globalization, Divergence and Stagnation," Working Papers 198, Barcelona Graduate School of Economics.
  4. Duranton, Gilles, 2004. "The economics of production systems: Segmentation and skill-biased change," European Economic Review, Elsevier, vol. 48(2), pages 307-336, April.
  5. Reinganum, Jennifer F, 1985. "Innovation and Industry Evolution," The Quarterly Journal of Economics, MIT Press, vol. 100(1), pages 81-99, February.
  6. Daron Acemoglu, 2000. "Labor- and Capital- Augmenting Technical Change," NBER Working Papers 7544, National Bureau of Economic Research, Inc.
  7. Acemoglu, Daron, 1997. "Why Do New Technologies Complement Skills? Directed Technical Change and Wage Inequality," CEPR Discussion Papers 1707, C.E.P.R. Discussion Papers.
  8. Paul Romer, 1989. "Endogenous Technological Change," NBER Working Papers 3210, National Bureau of Economic Research, Inc.
  9. 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..
  10. 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.
  11. 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.
  12. Milgrom, Paul & Roberts, John, 1996. "The LeChatelier Principle," American Economic Review, American Economic Association, vol. 86(1), pages 173-79, March.
  13. John A. James & Jonathan S. Skinner, 1984. "The Resolution of the Labor Scarcity Paradox," NBER Working Papers 1504, National Bureau of Economic Research, Inc.
  14. Michele Boldrin & David K Levine, 2002. "Perfectly Competitive Innovation," Levine's Working Paper Archive 625018000000000192, David K. Levine.
  15. Charles I. Jones, 2005. "The Shape of Production Functions and the Direction of Technical Change," The Quarterly Journal of Economics, MIT Press, vol. 120(2), pages 517-549, May.
  16. Bénabou, Roland, 2004. "Inequality, Technology and the Social Contract," CEPR Discussion Papers 4741, C.E.P.R. Discussion Papers.
  17. Stokey, Nancy L, 1995. "R&D and Economic Growth," Review of Economic Studies, Wiley Blackwell, vol. 62(3), pages 469-89, July.
  18. Milgrom, Paul & Shannon, Chris, 1994. "Monotone Comparative Statics," Econometrica, Econometric Society, vol. 62(1), pages 157-80, January.
  19. Nancy L. Stokey, 1990. "Human Capital, Product Quality, And Growth," NBER Working Papers 3413, National Bureau of Economic Research, Inc.
  20. Paul M Romer, 1999. "Increasing Returns and Long-Run Growth," Levine's Working Paper Archive 2232, David K. Levine.
  21. Caselli, Francesco & Coleman II, Wilbur John, 2000. "The World Technology Frontier," CEPR Discussion Papers 2584, C.E.P.R. Discussion Papers.
  22. Amir, Rabah, 1996. "Sensitivity analysis of multisector optimal economic dynamics," Journal of Mathematical Economics, Elsevier, vol. 25(1), pages 123-141.
  23. Roberts, Kevin, 1999. "Rationality and the LeChatelier Principle," Journal of Economic Theory, Elsevier, vol. 87(2), pages 416-428, August.
  24. 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.
  25. Grossman, Gene M & Shapiro, Carl, 1987. "Dynamic R&D Competition," Economic Journal, Royal Economic Society, vol. 97(386), pages 372-87, June.
  26. Joseph Farrell & Garth Saloner, 1985. "Standardization, Compatibility, and Innovation," RAND Journal of Economics, The RAND Corporation, vol. 16(1), pages 70-83, Spring.
  27. Daron Acemoglu, 2002. "Directed Technical Change," Review of Economic Studies, Oxford University Press, vol. 69(4), pages 781-809.
  28. Michael T. Kiley, 1997. "The supply of skilled labor and skill-based technological progress," Finance and Economics Discussion Series 1997-45, Board of Governors of the Federal Reserve System (U.S.).
  29. Daron Acemoglu, 1999. "Patterns of Skill Premia," NBER Working Papers 7018, National Bureau of Economic Research, Inc.
  30. Lucas, Robert Jr., 1988. "On the mechanics of economic development," Journal of Monetary Economics, Elsevier, vol. 22(1), pages 3-42, July.
  31. Katz, Michael L & Shapiro, Carl, 1985. "Network Externalities, Competition, and Compatibility," American Economic Review, American Economic Association, vol. 75(3), pages 424-40, June.
  32. Thoenig, Mathias & Verdier, Thierry, 2002. "A Theory of Defensive Skill-based Innovation and Globalization," CEPR Discussion Papers 3416, C.E.P.R. Discussion Papers.
  33. Reinganum, Jennifer F., . "Dynamic Games of Innovation," Working Papers 287, California Institute of Technology, Division of the Humanities and Social Sciences.
  34. 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.
  35. Vives, Xavier, 1990. "Nash equilibrium with strategic complementarities," Journal of Mathematical Economics, Elsevier, vol. 19(3), pages 305-321.
  36. 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.
  37. Young, Alwyn, 1993. "Invention and Bounded Learning by Doing," Journal of Political Economy, University of Chicago Press, vol. 101(3), pages 443-72, June.
  38. Aghion, Philippe & Howitt, Peter, 1992. "A Model of Growth Through Creative Destruction," Scholarly Articles 12490578, Harvard University Department of Economics.
  39. 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.
  40. repec:cup:cbooks:9780521364805 is not listed on IDEAS
  41. Spence, Michael, 1984. "Cost Reduction, Competition, and Industry Performance," Econometrica, Econometric Society, vol. 52(1), pages 101-21, January.
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