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

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 innovati...

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Bibliographic Details
Published in:The Journal of technology transfer 2006-01, Vol.31 (1), p.45-60
Main Author: Robbins, Carol A
Format: Article
Language:English
Subjects:
Classification
Cooperation
Drugs
Economic growth
Estimates
Innovations
Knowledge
Knowledge management
Manufacturing
Medical
Production functions
Production management
Productivity
Public good
R&D
Regions
Research & development
Research & development expenditures
Specialization
Studies
Technological change
Technology
Technology transfer
Transportation
Vaccines
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Summary: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.
ISSN:0892-9912
1573-7047
DOI:10.1007/s10961-005-5012-8