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Knowledge spillovers and the timing of R&D policy

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  • Geir H. Bjertnæs
  • Tom-Reiel Heggedal
  • Karl Jacobsen

Abstract

In this paper we analyze how knowledge spillovers influence the optimal timing of R&D policy. We find that the optimal R&D subsidy profile may be falling, increasing or constant. The time profile of the subsidy rates is crucially dependent on the elasticity of scale in R&D production, i.e. the spillover parameter plus labor elasticity, and the sign of the optimal growth rate of the knowledge stock. Constant subsidy rates are only optimal in knife edge cases. The problems are solved using both an analytical framework and numerical simulations.

Suggested Citation

  • Geir H. Bjertnæs & Tom-Reiel Heggedal & Karl Jacobsen, 2009. "Knowledge spillovers and the timing of R&D policy," DEGIT Conference Papers c014_042, DEGIT, Dynamics, Economic Growth, and International Trade.
  • Handle: RePEc:deg:conpap:c014_042
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    File URL: http://degit.sam.sdu.dk/papers/degit_14/c014_042.pdf
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    References listed on IDEAS

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    1. Aghion, Philippe & Howitt, Peter, 1992. "A Model of Growth through Creative Destruction," Econometrica, Econometric Society, pages 323-351.
    2. Bai, Chong-En & Li, David Daokui & Qian, Yingyi & Wang, Yijiang, 1999. "Anonymous Banking and Financial Repression: How Does China's Reform Limit Government Predation without Reducing Its Revenue?," CEPR Discussion Papers 2221, C.E.P.R. Discussion Papers.
    3. Jones, Charles I & Williams, John C, 2000. "Too Much of a Good Thing? The Economics of Investment in R&D," Journal of Economic Growth, Springer, vol. 5(1), pages 65-85, March.
    4. Gerlagh , Reyer & Kverndokk , Snorre & Rosendahl , Knut Einar, 2007. "Optimal Timing of Environmental Policy: Interaction Between Environmental Taxes and Innovation Externalities," Memorandum 26/2006, Oslo University, Department of Economics.
    5. Heggedal, Tom-Reiel & Jacobsen, Karl, 2011. "Timing of innovation policies when carbon emissions are restricted: An applied general equilibrium analysis," Resource and Energy Economics, Elsevier, vol. 33(4), pages 913-937.
    6. Kverndokk, Snorre & Rosendahl, Knut Einar, 2007. "Climate policies and learning by doing: Impacts and timing of technology subsidies," Resource and Energy Economics, Elsevier, vol. 29(1), pages 58-82, January.
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