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On Patents, R & D, and the Stock Market Rate of Return

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  • Pakes, Ariel

Abstract

Empirical work on the causes and effects of inventive activity has had difficulty in finding measures that can indicate when and where changes in either inventive inputs or inventive output have occurred. The recent computerization of the U.S. Patent Office's data base may prove helpful in this context, but there is the problem that a priori we do not know the relationships between patent applications and economically meaningful measures of these inputs and outputs. To help solve this problem, this paper investigates the dynamic relationships among the number of successful patent applications of firms, a measure of the firm's investment in inventive activity (its R & D expenditures), and an indicator of its inventive output (the stock market value of the firm).

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File URL: http://dash.harvard.edu/bitstream/handle/1/3436409/Pakes_OnPatents.pdf
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Paper provided by Harvard University Department of Economics in its series Scholarly Articles with number 3436409.

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Date of creation: 1985
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Publication status: Published in Journal of Political Economy -Chicago-
Handle: RePEc:hrv:faseco:3436409

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  1. Zvi Griliches, 1998. "Issues in Assessing the Contribution of Research and Development to Productivity Growth," NBER Chapters, in: R&D and Productivity: The Econometric Evidence, pages 17-45 National Bureau of Economic Research, Inc.
  2. Robert J. Shiller, 1980. "Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends?," NBER Working Papers 0456, National Bureau of Economic Research, Inc.
  3. Rosenberg, Nathan, 1974. "Science, Invention and Economic Growth," Economic Journal, Royal Economic Society, vol. 84(333), pages 90-108, March.
  4. Lester G. Telser, 1982. "A Theory of Innovation and Its Effects," Bell Journal of Economics, The RAND Corporation, vol. 13(1), pages 69-92, Spring.
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