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Building the Knowledge Stock: Lags, Depreciation and Uncertainty in Agricultural R&D

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  • Roberto ESPOSTI

    () (Universita' Politecnica delle Marche, Dipartimento di Economia)

  • Pierpaolo PIERANI

    ([n.a.])

Abstract

The search for an appropriate methodology to analyse the relation between R&D investments and the knowledge stock is the main purpose of the paper. The high estimates of internal rates of return on agricultural R&D reported in the literature suggest that there are major empirical problems with the traditional attribution of productivity growth to R&D investments. We model a stochastic gestation lag of research investment and a geometric depreciation of the knowledge stock. This model of knowledge accumulation from R&D investments outlines the basic parameters underlying the investment lag structure. According to the different types of research project, the approach is applied to public R&D expenditure in Italian agriculture in order to ascertain the empirical consequences and potential of the model.

Suggested Citation

  • Roberto ESPOSTI & Pierpaolo PIERANI, 2001. "Building the Knowledge Stock: Lags, Depreciation and Uncertainty in Agricultural R&D," Working Papers 145, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
  • Handle: RePEc:anc:wpaper:145
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    References listed on IDEAS

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    6. Catherine J. Morrison & Donald Siegel, 1998. "Knowledge Capital and Cost Structure in the U.S. Food and Fiber Industries," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 80(1), pages 30-45.
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    8. Roberto ESPOSTI, 1998. "Stochastic Technical Change and Procyclical TFP The Italian Agriculture Case," Working Papers 108, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    9. Ball, V Eldon, et al, 1993. "The Stock of Capital in European Community Agriculture," European Review of Agricultural Economics, Foundation for the European Review of Agricultural Economics, vol. 20(4), pages 437-450.
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    11. 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.
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    Cited by:

    1. Roberto Esposti & Pierpaolo Pierani, 2008. "Price-induced technical progress in Italian agriculture," Review of Agricultural and Environmental Studies - Revue d'Etudes en Agriculture et Environnement, INRA Department of Economics, vol. 89(4), pages 5-28.
    2. Jurgen Bitzer & Andreas Stephan, 2007. "A Schumpeter-inspired approach to the construction of R&D capital stocks," Applied Economics, Taylor & Francis Journals, vol. 39(2), pages 179-189.
    3. Esposti, Roberto, 2008. "Why Should Regional Agricultural Productivity Growth Converge? Evidence from Italian Regions," 2008 International Congress, August 26-29, 2008, Ghent, Belgium 43955, European Association of Agricultural Economists.
    4. Mika Maliranta, 2005. "R&D, International Trade and Creative Destruction—Empirical Findings from Finnish Manufacturing Industries," Journal of Industry, Competition and Trade, Springer, vol. 5(1), pages 27-58, January.
    5. Esposti, Roberto & Pierani, Pierpaolo, 2003. "Public R&D Investment From Private And Social Perspective. An Application To Italian Agriculture, 1960-1995," 2003 Annual Meeting, August 16-22, 2003, Durban, South Africa 25876, International Association of Agricultural Economists.
    6. Esposti, Roberto & Pierani, Pierpaolo, 2005. "Price-Induced Technological Change in Italian Agriculture: An SGM Restricted Cost Function Approach (1951-91)," 2005 International Congress, August 23-27, 2005, Copenhagen, Denmark 24662, European Association of Agricultural Economists.
    7. Roberto ESPOSTI, 2007. "On the Decline of Agriculture. Evidence from Italian Regions in the Post-WWII Period," Working Papers 300, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.

    More about this item

    Keywords

    knowledge stock; lag structure; research and development;

    JEL classification:

    • Q16 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - R&D; Agricultural Technology; Biofuels; Agricultural Extension Services

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