Mohamed Mabrouki


Patent policy aims not only to protect industrial property, but also to create incentives for innovation and thus to encourage companies to invest more in research and development. This policy should not consider excessive protection and should not constitute a barrier to the dissemination of knowledge. Indeed, by privatizing the knowledge of innovations, excessive protection is an obstacle to the dissemination of new ideas and a barrier to entry. This could therefore slow down innovation in the long term.The purpose of this article is to determine the optimal length of the patent in favor of innovation and growth.ISAEG     MACMA

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Aghion P. and Howitt P. (1992), «A Model of Growth through Creative Destruction», Econometrica, vol.60, No.2, pp. 323-351.

Caballero R. and Jaffe A. (1993), «How High are the Giants Shoulders: An Empirical Assessment of Knowledge Spillovers and Creative Destruction in a Model of economic Growth» in Blanchard O. et Fisher S. Eds.: NBER Macroeconomic Annual 1993, Cambridge, MIT Press.

Deffains B. (1997), «Progrès scientifique et analyse économique des droits de propriété intellectuelle», Revue d’Economie Industrielle 79, pp. 95-118.

Dixit A. and Stiglitz J. (1977), «Monopolistic Competition and Optimum Product Diversity», American Economic Review, Vol. 67, pp. 297-308.

Grossman G.M. and Helpman E. (1991, a), «Quality Ladders and Product Cycles», Quarterly Journal of Economics, Vol. CVI, issue 2, No. 425, may, pp. 557-586.

Grossman G.M. and Helpman E. (1991, b), «Quality Ladder in the Theory of Growth», Review of Economic Studies, Vol. 58, pp. 43-61.

Hotelling H. (1929), «Stability in Competition», Economic Journal, Vol. 39, No. 153, pp. 41-57.

Judd K. (1985), «On the performance of patents», Econometrica, Vol. 53, pp. 567- 585.

Koléda G. (2001) « Le brevet pour l’innovation au service de la croissance », Doctorat en Sciences Économiques – Université Paris I Panthéon-Sorbonne.

Koléda G. (2005), « La valeur de la protection des brevets français appréciée par leurs renouvellements » Économie et Prévision n°168 2005-2.

Michel P. and Nyssen J. (1998), «On Knowledge Diffusion, Patents Lifetime and Innovation Based Endogenous Growth», Annales d’Economie et de Statistiques, Vol. 49/50, pp. 79-103.

Nordhaus W. (1969), Invention, Growth and Welfare: A theoretical treatment of technological Change, Cambridge, Mass.: M.I.T. Press.

Nordhaus W. (1972), «The optimal life of patent: reply», American Economic review, vol. 62, pp. 428-431.

North D. (1990), Institutions, Institutional Change and Economic Performance, Cambridge University Press, Cambridge.

O’Donoghue T., Scotchmer S. and Thisse J.-F. (1998), «Patent Breadth, Patent Life, and the Pace of Technological Progress», Journal of Economics & Management Strategy, Vol. 7, No. 1, pp. 1-32.

Pakes A. et Schankerman M. (1984), «The Rate of Obsolescence of Patents, Research Gestation Lags, and the Private Rate of Return to Research Resources», in Griliches Z. ed., R&D, patents and productivity, Chicago, University of Chicago Press, pp.73-88.

Reinganum J. (1989), «The Timing of Innovation: Research, Development and Diffusion», dans Schmalensee R. et Willig R. eds., Handbook of Industrial Organization, volume 1, chapitre 14, Elsevier Science Publishers.

Romer P. (1990), «Endogenous Technological Change», Journal of Political Economy, Vol.98, pp.71-102.

Schankerman M. and Pakes A. (1986), «Estimates of the Value of Patent Rights in European Countries during the post-1950 Period», The Economic Journal, Vol.96, pp. 1052-1076.

Scherer F. (1972), «Nordhaus’ Theory of optimal patent life: a geometric reinterpretation», American Economic review, vol. 62, pp. 422-427.

Tirole, J. (1988). The Theory of Industrial Organization. Cambridge: MIT Press.

van Dijk T. (1994), «The Economic Theory of Patents: A Survey», MERIT Research Memorandum 2/94-017.


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