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R&D? A Small Contribution to Productivity Growth

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  • Comin, D.

Abstract

In this paper I calibrate the contribution of R&D investments to productivity growth. The basis for the analysis is the free entry condition. This yields a relationship between the resources devoted to R&D and the growth rate of technology. Since innovators are small, this relationship is not directly a¥ected by the size of the R&D externalities, the presence of scale effects or diminishing returns in R&D after controlling for the growth rate of output and the interest rate. The resulting contribution of R&D to productivity growth in the US is smaller than three to five tenths of one percentage point. Interestingly, this constitutes an upper bound for the case where innovators internalize the consequences of their R&D investments on the cost of conducting future innovations. From a normative perepective, this analysis implies that, if the innovation technology takes the form assumed in the literature, the actual US R&D intensity may be the socially optimal.

Suggested Citation

  • Comin, D., 2002. "R&D? A Small Contribution to Productivity Growth," Working Papers 02-01, C.V. Starr Center for Applied Economics, New York University.
  • Handle: RePEc:cvs:starer:02-01
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    More about this item

    Keywords

    RESEARCH AND DEVELOPMENT; PRODUCTIVITY GROWTH; TOTAL FACTOR PRODUCTIVITY;

    JEL classification:

    • O40 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General
    • E10 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - General

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