Uncovering GPTS with Patent Data
This paper asks the question: Can we see evidence of General Purpose Technologies in patent data? Using data on three million US patents granted between 1967 and 1999, and their citations received between 1975 and 2002, we construct a number of measures of GPTs, including generality, number of citations, and patent class growth, for patents themselves and for the patents that cite the patents. A selection of the top twenty patents in the tails of the distribution of several of these measures yields a set of mostly ICT technologies, of which the most important are those underlying transactions on the internet and object-oriented software. We conclude with a brief discussion of the problems we encountered in developing our measures and suggestions for future work in this area.
|Date of creation:||Nov 2004|
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|Publication status:||published as Antonelli, C., D. Foray, B. H. Hall, and W. E. Steinmueller (eds.) New Frontiers in the Economics of Innovation and New Technology, Essays in Honor of Paul David. Edward Elgar, 2006.|
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- Paul A. David & Gavin Wright, 2005. "General Purpose Technologies and Productivity Surges: Historical Reflections on the Future of the ICT Revolution," Economic History 0502002, EconWPA.
- David, Paul A, 1990. "The Dynamo and the Computer: An Historical Perspective on the Modern Productivity Paradox," American Economic Review, American Economic Association, vol. 80(2), pages 355-61, May.
- David, P.A., 1989. "Computer And Dynamo: The Modern Productivity Paradox In A Not-Too Distant Mirror," The Warwick Economics Research Paper Series (TWERPS) 339, University of Warwick, Department of Economics.
- Bronwyn H. Hall, 2004.
"Exploring the Patent Explosion,"
NBER Working Papers
10605, National Bureau of Economic Research, Inc.
- Bronwyn Hall, 2004. "Exploring the patent explosion," ESRC Centre for Business Research - Working Papers wp291, ESRC Centre for Business Research.
- Bronwyn H. Hall, 2005. "A Note on the Bias in Herfindahl-Type Measures Based on Count Data," Revue d'Économie Industrielle, Programme National Persée, vol. 110(1), pages 149-156.
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