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The Impact of Cost-Reducing R&D Spillovers on the Ergodic Distribution of Market Structures

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Author Info
Christopher A. Laincz () (Drexel University)
Ana Rodrigues () (Autoridade da Concorrência)
Abstract

We extend the literature on knowledge spillovers between firms by studying a dynamic duopoly model of R&D. Our analysis highlights the previously ignored welfare effects of spillovers through dynamic changes in industry concentration. In addition, we find that the impact of imperfect appropriability of R&D on concentration and welfare depends crucially on the manner in which spillovers are obtained. To date, the analysis of the impact of knowledge spillovers between firms has been largely restricted to static two-stage models (R&D decisions followed by product market decisions). These models generally predict suboptimal R&D expenditures and lower welfare. Such models are silent on the evolution of the market structure, and the resulting welfare implications, because they need to assume initial conditions (symmetry or asymmetry). We find that when spillovers require absorptive capacity investment in own R&D, larger spillovers lead to declines in concentration while rates of innovation increase and welfare rises. In contrast, when spillovers are costlessly obtained increases in the extent of spillovers rates of innovation fall leading to losses in welfare through both reduced consumer surplus and firm values, while the effect on concentration is ambiguous.

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Paper provided by Portuguese Competition Authority in its series Working Papers with number 23.

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Length: 50 pages
Date of creation: Jun 2007
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Handle: RePEc:pca:wpaper:23

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  1. Flaherty, M Therese, 1980. "Industry Structure and Cost-Reducing Investment," Econometrica, Econometric Society, vol. 48(5), pages 1187-1209, July. [Downloadable!] (restricted)
  2. d'Aspremont, Claude & Jacquemin, Alexis, 1988. "Cooperative and Noncooperative R&D in Duopoly with Spillovers," American Economic Review, American Economic Association, vol. 78(5), pages 1133-37, December. [Downloadable!] (restricted)
  3. Rosenberg, Nathan, 1974. "Science, Invention and Economic Growth," Economic Journal, Royal Economic Society, vol. 84(333), pages 90-108, March. [Downloadable!] (restricted)
  4. Budd, Christopher & Harris, Christopher & Vickers, John, 1993. "A Model of the Evolution of Duopoly: Does the Asymmetry between Firms Tend to Increase or Decrease?," Review of Economic Studies, Blackwell Publishing, vol. 60(3), pages 543-73, July. [Downloadable!] (restricted)
  5. Mansfield, Edwin & Schwartz, Mark & Wagner, Samuel, 1981. "Imitation Costs and Patents: An Empirical Study," Economic Journal, Royal Economic Society, vol. 91(364), pages 907-18, December. [Downloadable!] (restricted)
  6. 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. [Downloadable!]
  7. Loury, Glenn C, 1979. "Market Structure and Innovation," The Quarterly Journal of Economics, MIT Press, vol. 93(3), pages 395-410, August. [Downloadable!] (restricted)
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  8. Suzumura, Kotaro, 1992. "Cooperative and Noncooperative R&D in an Oligopoly with Spillovers," American Economic Review, American Economic Association, vol. 82(5), pages 1307-20, December. [Downloadable!] (restricted)
  9. Kamien, Morton I & Schwartz, Nancy L, 1972. "Timing of Innovations Under Rivalry," Econometrica, Econometric Society, vol. 40(1), pages 43-60, January. [Downloadable!] (restricted)
  10. Ariel Pakes & Paul McGuire, 1994. "Computing Markov-Perfect Nash Equilibria: Numerical Implications of a Dynamic Differentiated Product Model," RAND Journal of Economics, The RAND Corporation, vol. 25(4), pages 555-589, Winter. [Downloadable!] (restricted)
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  11. Malerba, Franco & Orsenigo, Luigi & Peretto, Pietro, 1997. "Persistence of innovative activities, sectoral patterns of innovation and international technological specialization," International Journal of Industrial Organization, Elsevier, vol. 15(6), pages 801-826, October. [Downloadable!] (restricted)
  12. Spence, Michael, 1984. "Cost Reduction, Competition, and Industry Performance," Econometrica, Econometric Society, vol. 52(1), pages 101-21, January. [Downloadable!] (restricted)
  13. 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. [Downloadable!] (restricted)
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