Scope of Innovations, Knowledge Spillovers and Growth
This paper exploits the formalization of a circular product differentiation model of Salop (1979) to propose an endogenous growth quality ladder model in which the knowledge inherent in a given sector can spread variously across the sectors of the economy, ranging from local to global influence. Accordingly, this affects the size of the pool of knowledge in which innovations draw themselves on in order to be produced. Therefore, the law of knowledge accumulation, and thus the growth rate of the economy, depend positively on the expected scope of diffusion of innovations, i.e. on the intensity of knowledge spillovers. This approach generalizes the endogenous growth theory as developed in the seminal models of Grossman & Helpman (1991) and Aghion & Howitt (1992), extending their analysis to the possibility of considering stochastic and partial knowledge spillovers. This framework allows us to mitigate the positive externality of knowledge and thus to apprehend the issue of the funding of research with more parsimony. We characterize the set of steady-state Schumpeterian equilibria as a function of the public tools. We provide an explanation for the fact that research effort can either be suboptimal or over-optimal, depending on the expected scope of knowledge. Accordingly, we find that the optimal public tool dedicated to foster R&D activity depends positively on it.
|Date of creation:||Mar 2010|
|Date of revision:|
|Contact details of provider:|| Phone: (+33) 5 61 12 86 23|
Web page: http://www.tse-fr.eu/
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Xavier Sala-i-Martin, 1995. "Transfers, social safety nets and economic growth," Economics Working Papers 139, Department of Economics and Business, Universitat Pompeu Fabra.
- Philippe Aghion & Diego Comin & Peter Howitt & Isabel Tecu, 2009.
"When Does Domestic Saving Matter for Economic Growth?,"
Harvard Business School Working Papers
09-080, Harvard Business School.
- Philippe Aghion & Diego Comin & Peter Howitt, 2006. "When Does Domestic Saving Matter for Economic Growth?," DEGIT Conference Papers c011_030, DEGIT, Dynamics, Economic Growth, and International Trade.
- Philippe Aghion & Diego Comin & Peter Howitt, 2006. "When Does Domestic Saving Matter for Economic Growth?," NBER Working Papers 12275, National Bureau of Economic Research, Inc.
- Andre Grimaud & Luc Rouge, 2004. "Polluting non-renewable resources, tradeable permits and endogenous growth," International Journal of Global Environmental Issues, Inderscience Enterprises Ltd, vol. 4(1/2/3), pages 38-57.
- Philippe Aghion & Peter Howitt, 2009.
"The Economics of Growth,"
MIT Press Books,
The MIT Press,
edition 1, volume 1, number 9780262012638, March.
- Cozzi, Guido & Giordani, Paolo E. & Zamparelli, Luca, 2007. "The refoundation of the symmetric equilibrium in Schumpeterian growth models," Journal of Economic Theory, Elsevier, vol. 136(1), pages 788-797, September.
- Robert J. Barro, 2013.
"Inflation and Economic Growth,"
Annals of Economics and Finance,
Society for AEF, vol. 14(1), pages 121-144, May.
When requesting a correction, please mention this item's handle: RePEc:tse:wpaper:22693. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()
If references are entirely missing, you can add them using this form.