The Economic Value of Patent Portfolios
Patent holders may choose to protect innovations with single patents or to develop portfolios of multiple, related inventions. We propose a simple decision-making model in which patent-holders may allocate resources to either expanding the number of related patents or investing in higher value of patents in the portfolio. We estimate the derived value equation using portfolio value data from an inventor survey. We find that investments in individual inventions exhibit diminishing returns, and that much of the value of a portfolio depends on adding new inventions. These effects are less pronounced in high-techology industries, when the inventions rely on external information, and when the inventor holds a doctorate. We also find higher returns to an increase of the number of inventions when firms perceive patent protection to be strong. Thus, a higher number of inventions in a portfolio may reflect both genuine creation of value or stronger appropriability via patents.
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- Hausman, Jerry & Hall, Bronwyn H & Griliches, Zvi, 1984.
"Econometric Models for Count Data with an Application to the Patents-R&D Relationship,"
Econometric Society, vol. 52(4), pages 909-938, July.
- Jerry A. Hausman & Bronwyn H. Hall & Zvi Griliches, 1984. "Econometric Models for Count Data with an Application to the Patents-R&D Relationship," NBER Technical Working Papers 0017, National Bureau of Economic Research, Inc.
- Giuri, Paola & Mariani, Myriam, 2007.
"Inventors and invention processes in Europe: Results from the PatVal-EU survey,"
Elsevier, vol. 36(8), pages 1105-1106, October.
- Giuri, Paola & Mariani, Myriam & Brusoni, Stefano & Crespi, Gustavo & Francoz, Dominique & Gambardella, Alfonso & Garcia-Fontes, Walter & Geuna, Aldo & Gonzales, Raul & Harhoff, Dietmar & Hoisl, Karin, 2007. "Inventors and invention processes in Europe: Results from the PatVal-EU survey," Research Policy, Elsevier, vol. 36(8), pages 1107-1127, October.
- Arora, Ashish & Ceccagnoli, Marco & Cohen, Wesley M., 2008.
"R&D and the patent premium,"
International Journal of Industrial Organization,
Elsevier, vol. 26(5), pages 1153-1179, September.
- Wesley M Cohen & Richard R Nelson & John P Walsh, 2003.
"Protecting Their Intellectual Assets: Appropriability Conditions and Why U.S. Manufacturing Firms Patent (Or Not),"
Levine's Working Paper Archive
618897000000000624, David K. Levine.
- Wesley M. Cohen & Richard R. Nelson & John P. Walsh, 2000. "Protecting Their Intellectual Assets: Appropriability Conditions and Why U.S. Manufacturing Firms Patent (or Not)," NBER Working Papers 7552, National Bureau of Economic Research, Inc.
- Rosemarie Ham Ziedonis, 2004. "Don't Fence Me In: Fragmented Markets for Technology and the Patent Acquisition Strategies of Firms," Management Science, INFORMS, vol. 50(6), pages 804-820, June.
- von Graevenitz, Georg & Wagner, Stefan & Harhoff, Dietmar, 2011.
"How to measure patent thickets--A novel approach,"
Elsevier, vol. 111(1), pages 6-9, April.
- Harhoff, Dietmar & von Graevenitz, Georg & Wagner, Stefan, 2008.
"Incidence and Growth of Patent Thickets - The Impact of Technological Opportunities and Complexity,"
CEPR Discussion Papers
6900, C.E.P.R. Discussion Papers.
- Georg Graevenitz & Stefan Wagner & Dietmar Harhoff, 2013. "Incidence and Growth of Patent Thickets: The Impact of Technological Opportunities and Complexity," Journal of Industrial Economics, Wiley Blackwell, vol. 61(3), pages 521-563, 09.
- Graevenitz, Georg von & Wagner, Stefan & Harhoff, Dietmar, 2011. "Incidence and Growth of Patent Thickets - The Impact of Technological Opportunities and Complexity," Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems 356, Free University of Berlin, Humboldt University of Berlin, University of Bonn, University of Mannheim, University of Munich.
- Carlos J. Serrano, 2006.
"The Dynamics of the Transfer and Renewal of Patents,"
tecipa-227, University of Toronto, Department of Economics.
- Carlos J. Serrano, 2010. "The dynamics of the transfer and renewal of patents," RAND Journal of Economics, RAND Corporation, vol. 41(4), pages 686-708.
- Carlos J. Serrano, 2008. "The Dynamics of the Transfer and Renewal of Patents," NBER Working Papers 13938, National Bureau of Economic Research, Inc.
- Dietmar Harhoff & Francis Narin & F. M. Scherer & Katrin Vopel, 1999. "Citation Frequency And The Value Of Patented Inventions," The Review of Economics and Statistics, MIT Press, vol. 81(3), pages 511-515, August.
- James Bessen, 2006.
"The Value of U.S. Patents by Owner and Patent Characteristics,"
0603, Research on Innovation.
- Bessen, James, 2008. "The value of U.S. patents by owner and patent characteristics," Research Policy, Elsevier, vol. 37(5), pages 932-945, June.
- Bessen, James, 2009. "Estimates of patent rents from firm market value," Research Policy, Elsevier, vol. 38(10), pages 1604-1616, December.
- Bronwyn H. Hall & Adam Jaffe & Manuel Trajtenberg, 2005. "Market Value and Patent Citations," RAND Journal of Economics, The RAND Corporation, vol. 36(1), pages 16-38, Spring.
- Maria Pluvia Zuniga & Dominique Guellec, 2009. "Who Licenses out Patents and Why?: Lessons from a Business Survey," OECD Science, Technology and Industry Working Papers 2009/5, OECD Publishing.
- Harhoff, Dietmar & Scherer, Frederic M. & Vopel, Katrin, 2003. "Citations, family size, opposition and the value of patent rights," Research Policy, Elsevier, vol. 32(8), pages 1343-1363, September.
- Manuel Trajtenberg, 1990. "A Penny for Your Quotes: Patent Citations and the Value of Innovations," RAND Journal of Economics, The RAND Corporation, vol. 21(1), pages 172-187, Spring.
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