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R&D, Investment, and Industry Dynamics

  • Saul Lach
  • Rafael Rob

We present a model of industry evolution where the dynamics are driven by a process of endogenous innovations followed by subsequent embodiments in physical capital. Traditionally, the only distinction between R&D and physical investment was one of labeling: the first process accumulates an intangible stock, knowledge, while the second accumulates physical capital. Both stocks affect output in a symmetric fashion. We argue that the story is not that simple, and that there is more to it than differences in the object of accumulation. Our model stresses the causal relationship between past R&D expenditures and current investments in machinery and equipment. This causality pattern, which is supported by the data, also explains the observed higher volatility of physical investment relative to that of R&D expenditures. Copyright 1996 The Massachusetts Institute of Technology.

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Article provided by Wiley Blackwell in its journal Journal of Economics & Management Strategy.

Volume (Year): 5 (1996)
Issue (Month): 2 (06)
Pages: 217-249

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Handle: RePEc:bla:jemstr:v:5:y:1996:i:2:p:217-249
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  1. Reinganum, Jennifer F, 1984. "Practical Implications of Game Theoretic Models of R&D," American Economic Review, American Economic Association, vol. 74(2), pages 61-66, May.
  2. Hall, Bronwyn H. & Hayashi, Fumio, 1989. "Research and Development as an Investment," Department of Economics, Working Paper Series qt8br8d266, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
  3. Aghion, P. & Howitt, P., 1990. "A Model Of Growth Through Creative Destruction," DELTA Working Papers 90-12, DELTA (Ecole normale supérieure).
  4. Dixit, Avinash, 1979. "The Role of Investment in Entry-Deterrence," The Warwick Economics Research Paper Series (TWERPS) 140, University of Warwick, Department of Economics.
  5. Gilbert, Richard J & Newbery, David M G, 1982. "Preemptive Patenting and the Persistence of Monopoly," American Economic Review, American Economic Association, vol. 72(3), pages 514-26, June.
  6. Reinganum, Jennifer F, 1983. "Uncertain Innovation and the Persistence of Monopoly," American Economic Review, American Economic Association, vol. 73(4), pages 741-48, September.
  7. Kenneth Arrow, 1962. "Economic Welfare and the Allocation of Resources for Invention," NBER Chapters, in: The Rate and Direction of Inventive Activity: Economic and Social Factors, pages 609-626 National Bureau of Economic Research, Inc.
  8. Christopher Harris & John Vickers, 1985. "Perfect Equilibrium in a Model of a Race," Review of Economic Studies, Oxford University Press, vol. 52(2), pages 193-209.
  9. Ernst R. Berndt & Zvi Griliches, 1993. "Price Indexes for Microcomputers: An Exploratory Study," NBER Chapters, in: Price Measurements and Their Uses, pages 63-100 National Bureau of Economic Research, Inc.
  10. Mueller,Dennis C., 2009. "Profits in the Long Run," Cambridge Books, Cambridge University Press, number 9780521101592, June.
  11. Glenn C. Loury, 1979. "Market Structure and Innovation," The Quarterly Journal of Economics, Oxford University Press, vol. 93(3), pages 395-410.
  12. Gort, Michael & Klepper, Steven, 1982. "Time Paths in the Diffusion of Product Innovations," Economic Journal, Royal Economic Society, vol. 92(367), pages 630-53, September.
  13. Roger H. Gordon & Mark Schankerman & Richard H. Spady, 1985. "Estimating the Effects of R&D on Bell System Productivity: A Model of Embodied Technical Change," NBER Working Papers 1607, National Bureau of Economic Research, Inc.
  14. Richard Ericson & Ariel Pakes, 1992. "An Alternative Theory of Firm and Industry Dynamics," Cowles Foundation Discussion Papers 1041, Cowles Foundation for Research in Economics, Yale University.
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