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Les externalitŽs de diffusion du savoir-faire permettent-elles de rattraper le retard dans les courses ˆ lÕinnovation?

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Author Info
Christine HALMENSCHLAGER (ERMES, UniversitŽ PanthŽon-Assas Paris 2)

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Abstract

Dans une course ˆ l'innovation, les possibilitŽs de rattrapage d'une entreprise distancŽe sont-elles aiguisŽes ou au contraire exclues par la prŽsence d'externalitŽs de R&D ? Pudenberg, Gilbert, Stiglitz et Tirole montrent dans une course au brevet avec observation imparfaite de l'activitŽ en R&D des entreprises rivales que ces possibilitŽs de rattrapage existent. Notre article introduit deux hypothses d'externalitŽs de diffusion du savoir-faire. Nous examinons ˆ l'Žquilibre, pour chacun d'eux, les consŽquences sur les possibilitŽs de rattrapage de la firme en retard. Dans un premier scŽnario, la part du savoir-faire acquis par chaque entreprise qui revient ˆ sa rivale est dŽcroissante : les possibilitŽs de rattrapage disparaissent ˆ l'Žquilibre. Dans un second scŽnario, le taux d'externalitŽ est constant : le rattrapage, mme rŽduit par le jeu des externalitŽs, reste possible ˆ l'Žquilibre. 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'expŽrience identiques. Nous mettons aussi en Žvidence qu'une modŽlisation diffŽrente des externalitŽs influence les possibilitŽs de rattrapage du retardataire.

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Paper provided by Université catholique de Louvain, Institut de Recherches Economiques et Sociales (IRES) in its series Discussion Papers (REL - Recherches Economiques de Louvain) with number 2004034.

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Length: 22
Date of creation: 01 Sep 2004
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Handle: RePEc:ctl:louvre:2004034

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Related research
Keywords: Course au brevet; ExternalitŽs; Rattrapage;

Find related papers by JEL classification:
C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
O31 - Economic Development, Technological Change, and Growth - - Technological Change - - - Innovation and Invention: Processes and Incentives

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  1. Harris, Christopher & Vickers, John, 1987. "Racing with Uncertainty," Review of Economic Studies, Blackwell Publishing, vol. 54(1), pages 1-21, January. [Downloadable!] (restricted)
  2. Mansfield, Edwin, 1985. "How Rapidly Does New Industrial Technology Leak Out?," Journal of Industrial Economics, Blackwell Publishing, vol. 34(2), pages 217-23, December. [Downloadable!] (restricted)
  3. Jay P. Choi, 1991. "Dynamic R&D Competition under "Hazard Rate" Uncertainty," RAND Journal of Economics, The RAND Corporation, vol. 22(4), pages 596-610, Winter. [Downloadable!] (restricted)
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  4. Harris, Christopher & Vickers, John, 1985. "Perfect Equilibrium in a Model of a Race," Review of Economic Studies, Blackwell Publishing, vol. 52(2), pages 193-209, April. [Downloadable!] (restricted)
  5. 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. [Downloadable!] (restricted)
  6. De Fraja, Giovanni, 1993. "Strategic spillovers in patent races," International Journal of Industrial Organization, Elsevier, vol. 11(1), pages 139-146, March. [Downloadable!] (restricted)
  7. 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_v1, HAL. [Downloadable!]
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