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Persistent heterogeneity of R&D intensities within sectors: Evidence and policy implications

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  • Coad, Alex

Abstract

Do firms in the same sector converge towards the same R&D intensities? Previous research has often assumed this to be true. A closer examination, using microdata from the EU Industrial R&D Investment Scoreboard for the years 2000–2015, shows considerable heterogeneity in R&D intensities among firms in the same sector, and that this heterogeneity persists over time. Statistical tests of convergence show that the variation in R&D intensities does not decrease over time (i.e. no σ-convergence), although firms with an R&D intensity below the industry average do seem to catch up with the leaders (i.e. evidence of β-convergence). Overall, firms in the same industry do not converge to a common R&D intensity. Policy implications are discussed.

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  • Coad, Alex, 2019. "Persistent heterogeneity of R&D intensities within sectors: Evidence and policy implications," Research Policy, Elsevier, vol. 48(1), pages 37-50.
    • Handle: RePEc:eee:respol:v:48:y:2019:i:1:p:37-50
    DOI: 10.1016/j.respol.2018.07.018
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    as
    1. Malerba, Franco, 2002. "Sectoral systems of innovation and production," Research Policy, Elsevier, vol. 31(2), pages 247-264, February.
    2. Álvaro Escribano & Rodolfo Stucchi, 2014. "Does recession drive convergence in firms’ productivity? Evidence from Spanish manufacturing firms," Journal of Productivity Analysis, Springer, vol. 41(3), pages 339-349, June.
    3. Philippe Aghion & Nick Bloom & Richard Blundell & Rachel Griffith & Peter Howitt, 2005. "Competition and Innovation: an Inverted-U Relationship," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 120(2), pages 701-728.
    4. Michele Cincera & Julien Ravet, 2010. "Financing constraints and R&D investments of large corporations in Europe and the US," Science and Public Policy, Oxford University Press, vol. 37(6), pages 455-466, July.
    5. John Bound & Clint Cummins & Zvi Griliches & Bronwyn H. Hall & Adam B. Jaffe, 1984. "Who Does R&D and Who Patents?," NBER Chapters, in: R&D, Patents, and Productivity, pages 21-54, National Bureau of Economic Research, Inc.
    6. Hartmann, Marcus & Hassan, Ali, 2006. "Application of real options analysis for pharmaceutical R&D project valuation--Empirical results from a survey," Research Policy, Elsevier, vol. 35(3), pages 343-354, April.
    7. Alex Coad, 2009. "The Growth of Firms," Books, Edward Elgar Publishing, number 13424.
    8. Nicholas Bloom & Mark Schankerman & John Van Reenen, 2013. "Identifying Technology Spillovers and Product Market Rivalry," Econometrica, Econometric Society, vol. 81(4), pages 1347-1393, July.
    9. Andrei Shleifer, 1985. "A Theory of Yardstick Competition," RAND Journal of Economics, The RAND Corporation, vol. 16(3), pages 319-327, Autumn.
    10. David Roodman, 2009. "How to do xtabond2: An introduction to difference and system GMM in Stata," Stata Journal, StataCorp LP, vol. 9(1), pages 86-136, March.
    11. Montresor, Sandro & Vezzani, Antonio, 2015. "The production function of top R&D investors: Accounting for size and sector heterogeneity with quantile estimations," Research Policy, Elsevier, vol. 44(2), pages 381-393.
    12. Pietro Moncada-Paternò-Castello & Marco Vivarelli & Peter Voigt, 2011. "Drivers and impacts in the globalization of corporate R&D: an introduction based on the European experience," Industrial and Corporate Change, Oxford University Press and the Associazione ICC, vol. 20(2), pages 585-603, April.
    13. Michele Cincera & Reinhilde Veugelers, 2011. "Europe's missing Yollies," Reflets et perspectives de la vie économique, De Boeck Université, vol. 0(3), pages 93-105.
    14. Franco Malerba, 2005. "Sectoral systems of innovation: a framework for linking innovation to the knowledge base, structure and dynamics of sectors," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 14(1-2), pages 63-82.
    15. Dirk Czarnitzki & Andrew A. Toole, 2011. "Patent Protection, Market Uncertainty, and R&D Investment," The Review of Economics and Statistics, MIT Press, vol. 93(1), pages 147-159, February.
    16. Grabowski, Henry G & Baxter, Nevins D, 1973. "Rivalry in Industrial Research and Development," Journal of Industrial Economics, Wiley Blackwell, vol. 21(3), pages 209-235, July.
    17. Martin Carree & Luuk Klomp, 1997. "Testing The Convergence Hypothesis: A Comment," The Review of Economics and Statistics, MIT Press, vol. 79(4), pages 683-686, November.
    18. Metcalfe, J S, 1994. "Competition, Fisher's Principle and Increasing Returns in the Selection Process," Journal of Evolutionary Economics, Springer, vol. 4(4), pages 327-346, November.
    19. Lichtenberg, Frank R, 1994. "Testing the Convergence Hypothesis," The Review of Economics and Statistics, MIT Press, vol. 76(3), pages 576-579, August.
    20. Alex Coad & Nicola Grassano, 2019. "Firm growth and R&D investment: SVAR evidence from the world’s top R&D investors," Industry and Innovation, Taylor & Francis Journals, vol. 26(5), pages 508-533, May.
    21. Zvi Griliches, 1984. "R&D, Patents, and Productivity," NBER Books, National Bureau of Economic Research, Inc, number gril84-1.
    22. Christopher F. Baum & Mustafa Caglayan & Oleksandr Talavera, 2016. "R&D Expenditures and Geographical Sales Diversification," Manchester School, University of Manchester, vol. 84(2), pages 197-221, March.
    23. Michele Cincera & Reinhilde Veugelers, 2013. "Young leading innovators and the EU's R&D intensity gap," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 22(2), pages 177-198, March.
    24. Hector Hernandez Guevara & Fernando Hervas Soriano & Alexander Tuebke & Antonio Vezzani & Sara Amoroso & Alexander Coad & Petros Gkotsis & Nicola Grassano, 2017. "The 2016 EU Industrial R&D Investment Scoreboard," JRC Research Reports JRC103716, Joint Research Centre.
    25. Giovanni Dosi, 2000. "Sources, Procedures, and Microeconomic Effects of Innovation," Chapters, in: Innovation, Organization and Economic Dynamics, chapter 2, pages 63-114, Edward Elgar Publishing.
    26. Himmelberg, Charles P & Petersen, Bruce C, 1994. "R&D and Internal Finance: A Panel Study of Small Firms in High-Tech Industries," The Review of Economics and Statistics, MIT Press, vol. 76(1), pages 38-51, February.
    27. Moncada-Paternò-Castello, Pietro & Ciupagea, Constantin & Smith, Keith & Tübke, Alexander & Tubbs, Mike, 2010. "Does Europe perform too little corporate R&D? A comparison of EU and non-EU corporate R&D performance," Research Policy, Elsevier, vol. 39(4), pages 523-536, May.
    28. García-Manjón, Juan V. & Romero-Merino, M. Elena, 2012. "Research, development, and firm growth. Empirical evidence from European top R&D spending firms," Research Policy, Elsevier, vol. 41(6), pages 1084-1092.
    29. Bronwyn H. Hall & Adam Jaffe & Manuel Trajtenberg, 2005. "Market Value and Patent Citations," RAND Journal of Economics, The RAND Corporation, vol. 36(1), pages 16-38, Spring.
    30. Bruno Pottelsberghe de la Potterie, 2008. "Europe's R&D: Missing the Wrong Targets?," Intereconomics: Review of European Economic Policy, Springer;ZBW - Leibniz Information Centre for Economics;Centre for European Policy Studies (CEPS), vol. 43(4), pages 220-225, July.
    31. Giovanni Dosi & Luigi Marengo, 2007. "On the Convergence of Evolutionary and Behavioral Theories of Organizations: A Tentative Roadmap," LEM Papers Series 2007/01, Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy.
    32. Leiponen, Aija & Drejer, Ina, 2007. "What exactly are technological regimes?: Intra-industry heterogeneity in the organization of innovation activities," Research Policy, Elsevier, vol. 36(8), pages 1221-1238, October.
    33. Blundell, Richard & Bond, Stephen, 1998. "Initial conditions and moment restrictions in dynamic panel data models," Journal of Econometrics, Elsevier, vol. 87(1), pages 115-143, August.
    34. Martin Srholec & Bart Verspagen, 2012. "The Voyage of the Beagle into innovation: explorations on heterogeneity, selection, and sectors," Industrial and Corporate Change, Oxford University Press and the Associazione ICC, vol. 21(5), pages 1221-1253, October.
    35. Pavitt, Keith, 1984. "Sectoral patterns of technical change: Towards a taxonomy and a theory," Research Policy, Elsevier, vol. 13(6), pages 343-373, December.
    36. John Sutton, 2007. "Market Share Dynamics and the "Persistence of Leadership" Debate," American Economic Review, American Economic Association, vol. 97(1), pages 222-241, March.
    37. Aune, Finn Roar & Mohn, Klaus & Osmundsen, Petter & Rosendahl, Knut Einar, 2010. "Financial market pressure, tacit collusion and oil price formation," Energy Economics, Elsevier, vol. 32(2), pages 389-398, March.
    38. F. M. Scherer, 1967. "Research and Development Resource Allocation Under Rivalry," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 81(3), pages 359-394.
    39. Chang-Yang Lee, 2002. "Industry R&D intensity distributions: regularities and underlying determinants," Journal of Evolutionary Economics, Springer, vol. 12(3), pages 307-341.
    40. Andreas Reinstaller & Fabian Unterlass, 2012. "Comparing business R&D across countries over time: a decomposition exercise using data for the EU 27," Applied Economics Letters, Taylor & Francis Journals, vol. 19(12), pages 1143-1148, August.
    41. Bronwyn Hall & Christian Helmers & Mark Rogers & Vania Sena, 2014. "The Choice between Formal and Informal Intellectual Property: A Review," Journal of Economic Literature, American Economic Association, vol. 52(2), pages 375-423, June.
    42. Hall, Bronwyn H, 1993. "The Stock Market's Valuation of R&D Investment during the 1980's," American Economic Review, American Economic Association, vol. 83(2), pages 259-264, May.
    43. Cohen, Wesley M & Klepper, Steven, 1996. "A Reprise of Size and R&D," Economic Journal, Royal Economic Society, vol. 106(437), pages 925-951, July.
    44. Friedman, Milton, 1992. "Do Old Fallacies Ever Die?," Journal of Economic Literature, American Economic Association, vol. 30(4), pages 2129-2132, December.
    45. Dani Rodrik, 2013. "Unconditional Convergence in Manufacturing," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 128(1), pages 165-204.
    46. Azele Mathieu & Bruno van Pottelsberghe de la Potterie, 2010. "A Note on the Drivers of R&D Intensity," Research in World Economy, Research in World Economy, Sciedu Press, vol. 1(1), pages 56-65, November.
    47. Cohen, Wesley M & Klepper, Steven, 1992. "The Anatomy of Industry R&D Intensity Distributions," American Economic Review, American Economic Association, vol. 82(4), pages 773-799, September.
    48. Hall, Bronwyn H. & Hayashi, Fumio, 1989. "Research and Development as an Investment," Department of Economics, Working Paper Series qt8br8d266, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
    49. Gadi Barlevy, 2007. "On the Cyclicality of Research and Development," American Economic Review, American Economic Association, vol. 97(4), pages 1131-1164, September.
    50. John Scott, 1984. "Firm versus Industry Variability in R&D Intensity," NBER Chapters, in: R&D, Patents, and Productivity, pages 233-248, National Bureau of Economic Research, Inc.
    51. Brown, James R. & Martinsson, Gustav & Petersen, Bruce C., 2017. "What promotes R&D? Comparative evidence from around the world," Research Policy, Elsevier, vol. 46(2), pages 447-462.
    52. Hector Hernandez Guevara & Fernando Hervas Soriano & Alexander Tuebke & Antonio Vezzani & Mafini Dosso & Sara Amoroso & Nicola Grassano & Alexander Coad & Petros Gkotsis, 2015. "The 2015 EU Industrial R&D Investment Scoreboard," JRC Research Reports JRC98287, Joint Research Centre.
    53. Thompson, Peter, 1999. "Rationality, rules of thumb, and R&D," Structural Change and Economic Dynamics, Elsevier, vol. 10(3-4), pages 321-340, December.
    54. Giovanni Dosi & Luigi Marengo, 2007. "Perspective---On the Evolutionary and Behavioral Theories of Organizations: A Tentative Roadmap," Organization Science, INFORMS, vol. 18(3), pages 491-502, June.
    55. Nazrul Islam, 1995. "Growth Empirics: A Panel Data Approach," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 110(4), pages 1127-1170.
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    More about this item

    Keywords

    R&D investment; R&D intensity; Convergence; Benchmarking; Heterogeneity; Evolutionary theory; Sectoral systems of innovation;
    All these keywords.

    JEL classification:

    • O3 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights
    • L2 - Industrial Organization - - Firm Objectives, Organization, and Behavior

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