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

Author

Listed:
  • Christopher A. Laincz

    (Drexel University)

  • Ana Rodrigues

    (University of York)

Abstract

We study a dynamic duopoly model of R\&D to analyze the impact of imperfect appropriability on market structure and welfare. We pursue this analysis by extending the Markov-Perfect dynamic industry model proposed by Ericson and Pakes (EP) (1995), through the introduction of a non-proprietary productivity component to R\&D as part of a dynamic, stochastic process. We find that when spillovers are costless, or that when firms can absorb spillovers by investing in imitative R\&D, the impact of the extent of spillovers on concentration levels is negligible. However, when.spillovers require absorptive capacity investment in own R\&D, concentration levels decline with increases in the extent of spillovers and welfare improves. The difference lies in the degree of substitutability between own and external R\&D sources. When own and external R\&D are perfect or nearly perfect substitutes, the rates of innovation and hence the market structures are unaffected. When spillovers can only be obtained through absorptive R\&D, the degree of substitutability falls, leading to higher rates of innovation, particularly by smaller firms,and a less concentrated market structure.

Suggested Citation

  • Christopher A. Laincz & Ana Rodrigues, 2006. "The Impact of Cost Reducing R\&D Spillovers on the Ergodic Distribution of Market Structures," Computing in Economics and Finance 2006 307, Society for Computational Economics.
    • Handle: RePEc:sce:scecfa:307
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    Cited by:

    1. Ron Borkovsky & Ulrich Doraszelski & Yaroslav Kryukov, 2012. "A dynamic quality ladder model with entry and exit: Exploring the equilibrium correspondence using the homotopy method," Quantitative Marketing and Economics (QME), Springer, vol. 10(2), pages 197-229, June.
    2. Doraszelski, Ulrich & Kryukov, Yaroslav & Borkovsky, Ron N., 2009. "A Dynamic Quality Ladder Model with Entry and Exit: Exploring the Equilibrium Correspondence Using the Homotopy Method," CEPR Discussion Papers 7560, C.E.P.R. Discussion Papers.

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    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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