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The Impact of Gravity-Weighted Knowledge Spillovers on Productivity in Manufacturing

  • Carol Robbins

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    This paper tests for localized knowledge spillovers from out-of-state innovations in U.S. manufacturing from 1977 to 1997. The source of these spillovers is innovations categorized into six technologies based on U.S. patent classes and patent data. Using a gravity-weighting for out-of-state innovations, knowledge spillovers are found from mechanical technologies and drug and medical technologies for a broad group of manufacturing industries. Innovations from chemical-related technologies are found to generate spillovers for the Chemical and Allied Products Industry and for the Transportation Equipment Industry. Additionally, specialization of production at the two-digit Standard Industrial Classification of industry level is also found to increase state-level productivity in manufacturing. Copyright Springer Science+Business Media, Inc. 2006

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    File URL: http://hdl.handle.net/10.1007/s10961-005-5012-8
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    Article provided by Springer in its journal The Journal of Technology Transfer.

    Volume (Year): 31 (2006)
    Issue (Month): 1 (01)
    Pages: 45-60

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    Handle: RePEc:kap:jtecht:v:31:y:2006:i:1:p:45-60
    Contact details of provider: Web page: http://www.springerlink.com/link.asp?id=104998

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    1. Adam B. Jaffe & Manuel Trajtenberg & Rebecca Henderson, 1992. "Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations," NBER Working Papers 3993, National Bureau of Economic Research, Inc.
    2. Hall, B. & Jaffe, A. & Trajtenberg, M., 2001. "The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools," Papers 2001-29, Tel Aviv.
    3. James Bessen & Robert M Hunt, 2004. "An Empirical Look at Software Patents," Levine's Working Paper Archive 122247000000000167, David K. Levine.
    4. Wolfgang Keller, 2001. "The Geography and Channels of Diffusion at the World's Technology Frontier," NBER Working Papers 8150, National Bureau of Economic Research, Inc.
    5. Timothy F. Bresnahan & Manuel Trajtenberg, 1992. "General Purpose Technologies "Engines of Growth?"," NBER Working Papers 4148, National Bureau of Economic Research, Inc.
    6. 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.
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