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Research and Productivity

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Author Info
Boyan Jovanovic
Yaw Nyarko

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Abstract

We model research as a signal on an unknown parameter of a technology. We distinguish applied from basic research and show that firms in the same industry can optimally choose different research portfolios, and that basic research can seem to have a higher rate of return than applied research, even though it really doesn't -- essentially, firms on a 'fast track' upgrading policy opt for basic research but fast and slow-track upgrading policies can coexist in a long-run equilibrium. We also derive the lag structure for how R&D affects the firm's stock of knowledge. To a first approximation, the lags decay geometrically (as is typically assumed in practice) but the rate of decay is endogenous, and depends on how fast the firm is upgrading its technology.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 5321.

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Date of creation: Oct 1995
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Handle: RePEc:nbr:nberwo:5321

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  1. 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. [Downloadable!] (restricted)
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  2. Sudipto Bhattacharya & Dilip Mookherjee, 1986. "Portfolio Choice in Research and Development," RAND Journal of Economics, The RAND Corporation, vol. 17(4), pages 594-605, Winter.
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  3. Lach, Saul & Schankerman, Mark, 1989. "Dynamics of R&D and Investment in the Scientific Sector," Journal of Political Economy, University of Chicago Press, vol. 97(4), pages 880-904, August. [Downloadable!] (restricted)
  4. Bahk, Byong-Hong & Gort, Michael, 1993. "Decomposing Learning by Doing in New Plants," Journal of Political Economy, University of Chicago Press, vol. 101(4), pages 561-83, August. [Downloadable!] (restricted)
  5. 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. [Downloadable!] (restricted)
  6. Adams, James D, 1990. "Fundamental Stocks of Knowledge and Productivity Growth," Journal of Political Economy, University of Chicago Press, vol. 98(4), pages 673-702, August. [Downloadable!] (restricted)
  7. Doms, Mark & Dunne, Timothy & Roberts, Mark J., 1995. "The role of technology use in the survival and growth of manufacturing plants," International Journal of Industrial Organization, Elsevier, vol. 13(4), pages 523-542, December. [Downloadable!] (restricted)
  8. Manuel Trajtenberg & Rebecca Henderson & Adam Jaffe, 1992. "Ivory Tower Versus Corporate Lab: An Empirical Study of Basic Research and Appropriability," NBER Working Papers 4146, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  9. Link, Albert N, 1981. "Basic Research and Productivity Increase in Manufacturing: Additional Evidence," American Economic Review, American Economic Association, vol. 71(5), pages 1111-12, December. [Downloadable!] (restricted)
  10. Mansfield, Edwin, 1980. "Basic Research and Productivity Increase in Manufacturing," American Economic Review, American Economic Association, vol. 70(5), pages 863-73, December. [Downloadable!] (restricted)
  11. Mark Rosenzweig & Andrew D. Foster, . "Learning by Doing and Learning from Others: Human Capital and Technical Change in Agriculture," Home Pages _068, University of Pennsylvania. [Downloadable!]
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  12. Stephen D. Oliner, 1993. "New evidence on the retirement and depreciation of machine tools," Working Paper Series / Economic Activity Section 147, Board of Governors of the Federal Reserve System (U.S.).
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  13. Ariel Pakes & Mark Schankerman, 1984. "The Rate of Obsolescence of Patents, Research Gestation Lags, and the Private Rate of Return to Research Resources," NBER Chapters, in: R & D, Patents, and Productivity, pages 73-88 National Bureau of Economic Research, Inc. [Downloadable!]
  14. Frank R. Lichtenberg & Donald Siegel, 1991. "The Impact of R&D Investment On Productivity - New Evidence Using Linked R&D-LRD Data," NBER Working Papers 2901, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  1. 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. [Downloadable!] (restricted)
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