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

  • Hélène 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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Article provided by De Boeck Université in its journal Recherches économiques de Louvain.

Volume (Year): 70 (2004)
Issue (Month): 3 ()
Pages: 341-361

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Handle: RePEc:cai:reldbu:rel_703_0341
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  1. Harris, Christopher & Vickers, John, 1987. "Racing with Uncertainty," Review of Economic Studies, Wiley Blackwell, vol. 54(1), pages 1-21, January.
  2. Rabah Amir, 1998. "Modelling Imperfectly Appropriable R&D via Spillovers," CIE Discussion Papers 1998-07, University of Copenhagen. Department of Economics. Centre for Industrial Economics.
  3. Loury, Glenn C, 1979. "Market Structure and Innovation," The Quarterly Journal of Economics, MIT Press, vol. 93(3), pages 395-410, August.
  4. AMIR, Rabah & WOODERS, John, 1997. "One-way spillovers, endogenous innovator/imitator roles and research joint ventures," CORE Discussion Papers 1997027, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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  7. Encaoua, D. & Ulph, D., 2000. "Catching-up or Leapfrogging ? The Effects of Competition on Innovation and Growth," Papiers d'Economie Mathématique et Applications 2000.97, Université Panthéon-Sorbonne (Paris 1).
  8. De Fraja, Giovanni, 1993. "Strategic spillovers in patent races," International Journal of Industrial Organization, Elsevier, vol. 11(1), pages 139-146, March.
  9. Lee, Tom & Wilde, Louis L, 1980. "Market Structure and Innovation: A Reformulation," The Quarterly Journal of Economics, MIT Press, vol. 94(2), pages 429-36, March.
  10. Mansfield, Edwin, 1985. "How Rapidly Does New Industrial Technology Leak Out?," Journal of Industrial Economics, Wiley Blackwell, vol. 34(2), pages 217-23, December.
  11. 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.
  12. 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).
  13. Harris, Christopher & Vickers, John, 1985. "Perfect Equilibrium in a Model of a Race," Review of Economic Studies, Wiley Blackwell, vol. 52(2), pages 193-209, April.
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