Anticommons and Optimal Patent Policy in a Model of Sequential Innovation
AbstractWe present a model of sequential innovation in which innovators use several research inputs to invent new goods. We extend work by Shapiro (2001) and Lerner and Tirole (2004) by studying the effects of increases in the number of patented research inputs on innovation incentives and optimal patent policy. We consider not only the effects on the incentives to invent final goods, but also on the incentives to invent research inputs (ex-ante effect). We find increasing complexity has a negative effect on innovation activity in the final goods sector when research inputs are complements. Either limiting market power through weaker patents or reducing the lack of coordination through patent pools may solve this problem. We also find the optimal patent breadth and show it is increasing in the elasticity of substitution between the inputs used in research and decreasing (increasing) in the complexity of the R&D process when research inputs are complements (substitutes).
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Bibliographic InfoArticle provided by De Gruyter in its journal The B.E. Journal of Economic Analysis & Policy.
Volume (Year): 11 (2011)
Issue (Month): 1 (August)
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Web page: http://www.degruyter.com
Other versions of this item:
- Gaston Llanes & Stefano Trento, 2007. "Anticommons and optimal patent policy in a model of sequential innovation," Economics Working Papers we076838, Universidad Carlos III, Departamento de Economía.
- Gastón Llanes & Stefano Trento, 2009. "Anticommons and Optimal Patent Policy in a Model of Sequential Innovation," Harvard Business School Working Papers 09-148, Harvard Business School.
- O31 - Economic Development, Technological Change, and Growth - - Technological Change; Research and Development; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
- O34 - Economic Development, Technological Change, and Growth - - Technological Change; Research and Development; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital
- L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices
- D4 - Microeconomics - - Market Structure and Pricing
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