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Les externalités de diffusion du savoir-faire permettent- elles de rattraper le retard dans les courses à l'innovation

  • C. HALMENSCHLAGER

Dans une course à l'innovation, les possibilités de rattrapage d'une entreprise distancée sont-elles aiguisées ou au contraire exclues par la présence d'externalités de R&D ? Pudenberg, Gilbert, Stiglitz et Tirole montrent dans une course au brevet avec observation imparfaite de l'activité en R&D des entreprises rivales que ces possibilités de rattrapage existent. Notre article introduit deux hypothèses d'externalités de diffusion du savoir-faire. Nous examinons à l'équilibre, pour chacun d'eux, les conséquences sur les possibilités de rattrapage de la firme en retard. Dans un premier scénario, la part du savoir-faire acquis par chaque entreprise qui revient à sa rivale est décroissante : les possibilités de rattrapage disparaissent à l'équilibre. Dans un second scénario, le taux d'externalité est constant : le rattrapage, même réduit par le jeu des externalités, reste possible à l'équilibre. Nous concluons que dans ce contexte dynamique, les spillovers ont l'effet contre-intuitif d'augmenter la vitesse de l'innovation pour des firmes avec des niveaux d'expérience identiques. Nous mettons aussi en évidence qu'une modélisation différente des externalités influence les possibilités de rattrapage du retardataire.

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Paper provided by ERMES, University Paris 2 in its series Working Papers ERMES with number 0304.

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Date of creation: 2003
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Handle: RePEc:erm:papers:0304
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  1. Christopher Harris & John Vickers, 1987. "Racing with Uncertainty," Review of Economic Studies, Oxford University Press, vol. 54(1), pages 1-21.
  2. Amir, Rabah & Wooders, John, 1997. "One-Way Spillovers, Endogenous Innovator/Imitator Roles and Research Joint Ventures," Economics Series 43, Institute for Advanced Studies.
  3. 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.
  4. Mansfield, Edwin, 1985. "How Rapidly Does New Industrial Technology Leak Out?," Journal of Industrial Economics, Wiley Blackwell, vol. 34(2), pages 217-23, December.
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  7. Aoki, Reiko, 1991. "R&D Competition for Product Innovation: An Endless Race," American Economic Review, American Economic Association, vol. 81(2), pages 252-56, May.
  8. d'ASPREMONT, Claude & JACQUEMIN, Alexis, . "Cooperative and noncooperative R&D in duopoly with spillovers," CORE Discussion Papers RP 823, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  9. Tom Lee & Louis L. Wilde, 1980. "Market Structure and Innovation: A Reformulation," The Quarterly Journal of Economics, Oxford University Press, vol. 94(2), pages 429-436.
  10. Glenn C. Loury, 1979. "Market Structure and Innovation," The Quarterly Journal of Economics, Oxford University Press, vol. 93(3), pages 395-410.
  11. David Encaoua & David Ulph, 2005. "Catching-up or Leapfrogging: The effects of competition on innovation and growth," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00177643, HAL.
  12. Fudenberg, Drew & Gilbert, Richard & Stiglitz, Joseph & Tirole, Jean, 1983. "Preemption, leapfrogging and competition in patent races," European Economic Review, Elsevier, vol. 22(1), pages 3-31, June.
  13. Amir, Rabah, 2000. "Modelling imperfectly appropriable R&D via spillovers," International Journal of Industrial Organization, Elsevier, vol. 18(7), pages 1013-1032, October.
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