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They Don'T Invent Them Like They Used To: An Examination Of Energy Patent Citations Over Time

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  • David Popp
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    Abstract

    This article uses patent citation data to study flows of knowledge across time and across institutions in the field of energy research. Popp [2002, Induced Innovation and Energy Prices. American Economic Review, 92(1), 160-180.] finds that the level of energy-saving research and development (R&D) depends not only on energy prices, but also on the quality of the accumulated knowledge available to inventors. Patent citations are used to represent this quality. This article explores the pattern of citations in these fields more carefully. Evidence for diminishing returns to research inputs, both across time and within a given year is found. To check whether government R&D can help alleviate potential diminishing returns, special attention is paid to citations to government patents. The government patents filed in or after 1981 are more likely to be cited. More importantly, descendants of these government patents are 30% more likely to be cited by subsequent patents. Earlier government research was more applied in nature and is not cited more frequently.

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    File URL: http://www.tandfonline.com/doi/abs/10.1080/10438590500510459
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    Bibliographic Info

    Article provided by Taylor & Francis Journals in its journal Economics of Innovation and New Technology.

    Volume (Year): 15 (2006)
    Issue (Month): 8 ()
    Pages: 753-776

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    Handle: RePEc:taf:ecinnt:v:15:y:2006:i:8:p:753-776

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    Web page: http://www.tandfonline.com/GEIN20

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    Keywords: Patents; Citations; Research and development; Energy; Diminishing returns;

    References

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    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.:
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    1. Jaffe, A.B. & Trajtenberg, M., 1992. "Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations," Papers 14-92, Tel Aviv.
    2. Adam B. Jaffe & Michael S. Fogarty & Bruce A. Banks, 1997. "Evidence from Patents and Patent Citations on the Impact of NASA and Other Federal Labs on Commercial Innovation," NBER Working Papers 6044, National Bureau of Economic Research, Inc.
    3. Pakes, Ariel S, 1986. "Patents as Options: Some Estimates of the Value of Holding European Patent Stocks," Econometrica, Econometric Society, vol. 54(4), pages 755-84, July.
    4. Bronwyn H. Hall & Adam B. Jaffe & Manuel Trajtenberg, 2001. "The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools," NBER Working Papers 8498, National Bureau of Economic Research, Inc.
    5. Kim B. Clark & Zvi Griliches, 1984. "Productivity Growth and R&D at the Business Level: Results from the PIMS Data Base," NBER Chapters, in: R & D, Patents, and Productivity, pages 393-416 National Bureau of Economic Research, Inc.
    6. Milliman, Scott R. & Prince, Raymond, 1989. "Firm incentives to promote technological change in pollution control," Journal of Environmental Economics and Management, Elsevier, vol. 17(3), pages 247-265, November.
    7. Ricardo J. Caballero & Adam B. Jaffe, 1993. "How High are the Giants' Shoulders: An Empirical Assessment of Knowledge Spillovers and Creative Destruction in a Model of Economic Growth," NBER Working Papers 4370, National Bureau of Economic Research, Inc.
    8. Stavins, Robert & Jaffe, Adam & Newell, Richard, 1998. "The Induced Innovation Hypothesis and Energy-Saving Technological Change," Discussion Papers dp-98-12-rev, Resources For the Future.
    9. Stavins, Robert & Jaffe, Adam & Newell, Richard, 2000. "Technological Change and the Environment," Working Paper Series rwp00-002, Harvard University, John F. Kennedy School of Government.
    10. Adam B. Jaffe & Manuel Trajtenberg, 1996. "Flows of Knowledge from Universities and Federal Labs: Modeling the Flowof Patent Citations Over Time and Across Institutional and Geographic Boundari," NBER Working Papers 5712, National Bureau of Economic Research, Inc.
    11. Adam B. Jaffe & Karen Palmer, 1997. "Environmental Regulation And Innovation: A Panel Data Study," The Review of Economics and Statistics, MIT Press, vol. 79(4), pages 610-619, November.
    12. Milliman, Scott R. & Prince, Raymond, 1992. "Firm incentives to promote technological change in pollution control: Reply," Journal of Environmental Economics and Management, Elsevier, vol. 22(3), pages 292-296, May.
    13. Ariel Pakes & Mark Schankerman, 1979. "The Rate of Obsolescence Of Knowledge, Research Gestation Lags, and the Private Rate of Return to Research Resources," NBER Working Papers 0346, National Bureau of Economic Research, Inc.
    14. Zvi Griliches & Jacques Mairesse, 1981. "Productivity and R and D at the Firm Level," NBER Working Papers 0826, National Bureau of Economic Research, Inc.
    15. Jean O. Lanjouw & Ariel Pakes & Jonathan Putnam, 1996. "How to Count Patents and Value Intellectual Property: Uses of Patent Renewal and Application Data," NBER Working Papers 5741, National Bureau of Economic Research, Inc.
    16. Jung, Chulho & Krutilla, Kerry & Boyd, Roy, 1996. "Incentives for Advanced Pollution Abatement Technology at the Industry Level: An Evaluation of Policy Alternatives," Journal of Environmental Economics and Management, Elsevier, vol. 30(1), pages 95-111, January.
    17. Winkelmann, Rainer & Zimmermann, Klaus F, 1995. " Recent Developments in Count Data Modelling: Theory and Application," Journal of Economic Surveys, Wiley Blackwell, vol. 9(1), pages 1-24, March.
    18. Popp, David, 2004. "ENTICE: endogenous technological change in the DICE model of global warming," Journal of Environmental Economics and Management, Elsevier, vol. 48(1), pages 742-768, July.
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    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
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    Cited by:
    1. Popp, David & Newell, Richard, 2012. "Where does energy R&D come from? Examining crowding out from energy R&D," Energy Economics, Elsevier, vol. 34(4), pages 980-991.
    2. Lionel Nesta & Francesco Vona & Francesco Nicolli, 2012. "Environmental Policies, Product Market Regulation and Innovation in Renewable Energy," Working Papers 2012.90, Fondazione Eni Enrico Mattei.
    3. Nemet, Gregory F., 2012. "Inter-technology knowledge spillovers for energy technologies," Energy Economics, Elsevier, vol. 34(5), pages 1259-1270.
    4. David Popp & Richard G. Newell & Adam B. Jaffe, 2009. "Energy, the Environment, and Technological Change," NBER Working Papers 14832, National Bureau of Economic Research, Inc.
    5. Pizer, William A. & Popp, David, 2008. "Endogenizing technological change: Matching empirical evidence to modeling needs," Energy Economics, Elsevier, vol. 30(6), pages 2754-2770, November.
    6. Nemet, Gregory F. & Johnson, Evan, 2012. "Do important inventions benefit from knowledge originating in other technological domains?," Research Policy, Elsevier, vol. 41(1), pages 190-200.
    7. Popp, David & Santen, Nidhi & Fisher-Vanden, Karen & Webster, Mort, 2013. "Technology variation vs. R&D uncertainty: What matters most for energy patent success?," Resource and Energy Economics, Elsevier, vol. 35(4), pages 505-533.

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