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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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    Cited by:

    1. Stefania BUSSOLETTI & Roberto ESPOSTI, 2004. "Regional Convergence, Structural Funds and the Role of Agricolture in the EU. A Panel-Data Approach," Working Papers 220, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    2. Ugo FRATESI, 2003. "Innovation Diffusion and the Evolution of Regional Disparities," Working Papers 186, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    3. Renato BALDUCCI, 2005. "Public Expenditure and Economic Growth. A critical extension of Barro's (1990) model," Working Papers 240, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    4. Esposti, Roberto & Pierani, Pierpaolo, 2008. "Price-induced technical progress in Italian agriculture," Review of Agricultural and Environmental Studies - Revue d'Etudes en Agriculture et Environnement (RAEStud), Institut National de la Recherche Agronomique (INRA), vol. 89(4).
    5. Nicola MATTEUCCI & Alessandro STERLACCHINI, 2003. "ICT and Employment Growth in Italian Industries," Working Papers 193, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    6. 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.
    7. 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.
    8. Ruhul A. Salim & Nazrul Islam, 2010. "Exploring the impact of R&D and climate change on agricultural productivity growth: the case of Western Australia ," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 54(4), pages 561-582, October.
    9. 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.
    10. Marcello MESSORI & Alberto ZAZZARO, 2004. "Monetary profits within the circuit: Ponzi finance oer "mors tua, vita mea"?," Working Papers 200, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    11. Mirela Stoian & Raluca Andreea Ion & Vlad Constantin Turcea & Ionut Catalin Nica & Catalin Gheorghe Zemeleaga, 2022. "The Influence of Governmental Agricultural R&D Expenditure on Farmers’ Income—Disparities between EU Member States," Sustainability, MDPI, vol. 14(17), pages 1-14, August.
    12. 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.
    13. 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.
    14. Roberto ESPOSTI & Pierpaolo PIERANI, 2005. "Price, Private Demand and Optimal Provision of Public R&D in Italian Agriculture," Working Papers 238, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    15. Elvio MATTIOLI, 2003. "The measurement of coherence in the evaluation of criteria and its effects or ranking problems illustrated using a multicriteria decision method," Working Papers 199, Universita' Politecnica delle Marche (I), Dipartimento di Scienze Economiche e Sociali.
    16. 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.

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    More about this item

    Keywords

    knowledge stock; lag structure; research and development;
    All these keywords.

    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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