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A time to nourish? Evaluating the impact of public procurement on technological generality through patent data

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  • Raiteri, Emilio

Abstract

Innovative public procurement is increasingly considered as a form of public support for private innovation activities by both innovation scholars and policymakers. Economic historians have suggested an even more fundamental role of public procurement in setting the pace of technological change, reporting how defense-related procurement has had a major impact on the emergence and diffusion of many general purpose technologies developed in the United States in the 20th century. In this paper, I suggest that procurement might represent one of the most important elements in creating the right soil to ‘cultivate’ a technology that may have the potential to reach high levels of pervasiveness. To test this hypothesis, I make use of patent data and patent citations. I design a quasi-experiment to compare the changes in the level of generality level over time, between a group of treated and a group of control patents. A patent is assigned to the treatment group if it receives a citation from a patent related to public procurement. Results suggest a positive and significant impact of innovative public procurement on the generality of a patent.

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  • Raiteri, Emilio, 2018. "A time to nourish? Evaluating the impact of public procurement on technological generality through patent data," Research Policy, Elsevier, vol. 47(5), pages 936-952.
  • Handle: RePEc:eee:respol:v:47:y:2018:i:5:p:936-952
    DOI: 10.1016/j.respol.2018.02.017
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    as
    1. Lanjouw, Jean O & Schankerman, Mark, 2001. "Characteristics of Patent Litigation: A Window on Competition," RAND Journal of Economics, The RAND Corporation, vol. 32(1), pages 129-151, Spring.
    2. Bresnahan, Timothy F. & Trajtenberg, M., 1995. "General purpose technologies 'Engines of growth'?," Journal of Econometrics, Elsevier, vol. 65(1), pages 83-108, January.
    3. Jacob Schmookler, 1962. "Changes in Industry and in the State of Knowledge as Determinants of Industrial Invention," NBER Chapters, in: The Rate and Direction of Inventive Activity: Economic and Social Factors, pages 195-232, National Bureau of Economic Research, Inc.
    4. Mokyr, Joel, 1990. "Punctuated Equilibria and Technological Progress," American Economic Review, American Economic Association, vol. 80(2), pages 350-354, May.
    5. Marco Guerzoni, 2010. "The impact of market size and users' sophistication on innovation: the patterns of demand," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 19(1), pages 113-126.
    6. Roberto Fontana & Marco Guerzoni, 2008. "Incentives and uncertainty: an empirical analysis of the impact of demand on innovation," Cambridge Journal of Economics, Cambridge Political Economy Society, vol. 32(6), pages 927-946, November.
    7. Max Rolfstam, 2009. "Public procurement as an innovation policy tool: The role of institutions," Science and Public Policy, Oxford University Press, vol. 36(5), pages 349-360, June.
    8. Nathan Rosenberg & Manuel Trajtenberg, 2009. "A General-Purpose Technology at Work: The Corliss Steam Engine in the Late-Nineteenth-Century United States," World Scientific Book Chapters, in: Nathan Rosenberg (ed.), Studies On Science And The Innovation Process Selected Works of Nathan Rosenberg, chapter 6, pages 97-135, World Scientific Publishing Co. Pte. Ltd..
    9. Manuel Trajtenberg, 1990. "A Penny for Your Quotes: Patent Citations and the Value of Innovations," RAND Journal of Economics, The RAND Corporation, vol. 21(1), pages 172-187, Spring.
    10. Lichtenberg, Frank R, 1988. "The Private R&D Investment Response to Federal Design and Technical Competitions," American Economic Review, American Economic Association, vol. 78(3), pages 550-559, June.
    11. Petra Moser & Tom Nicholas, 2004. "Was Electricity a General Purpose Technology? Evidence from Historical Patent Citations," American Economic Review, American Economic Association, vol. 94(2), pages 388-394, May.
    12. Jeffrey B. Liebman & Neale Mahoney, 2013. "Do Expiring Budgets Lead to Wasteful Year-End Spending? Evidence from Federal Procurement," NBER Working Papers 19481, National Bureau of Economic Research, Inc.
    13. Edler, Jakob & Georghiou, Luke, 2007. "Public procurement and innovation--Resurrecting the demand side," Research Policy, Elsevier, vol. 36(7), pages 949-963, September.
    14. 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.
    15. Cowan, Robin & Foray, Dominique, 1995. "Quandaries in the economics of dual technologies and spillovers from military to civilian research and development," Research Policy, Elsevier, vol. 24(6), pages 851-868, November.
    16. Adam B. Jaffe & Manuel Trajtenberg & Rebecca Henderson, 1993. "Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 108(3), pages 577-598.
    17. Neale Mahoney, 2013. "Expiring Budgets and Wasteful Year-End Spending in Federal Procurement," 2013 Meeting Papers 705, Society for Economic Dynamics.
    18. Rebecca Henderson & Adam B. Jaffe & Manuel Trajtenberg, 1998. "Universities As A Source Of Commercial Technology: A Detailed Analysis Of University Patenting, 1965-1988," The Review of Economics and Statistics, MIT Press, vol. 80(1), pages 119-127, February.
    19. Hall, B. & Jaffe, A. & Trajtenberg, M., 2001. "The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools," Papers 2001-29, Tel Aviv.
    20. Helpman, Elhanan & Trajtenberg, Manuel, 1994. "A Time to Sow and a Time to Reap: Growth Based on General Purpose Technologies," CEPR Discussion Papers 1080, C.E.P.R. Discussion Papers.
    21. Bronwyn H. Hall & Manuel Trajtenberg, 2004. "Uncovering GPTS with Patent Data," NBER Working Papers 10901, National Bureau of Economic Research, Inc.
    22. Ruttan, Vernon W., 2006. "Is War Necessary for Economic Growth?: Military Procurement and Technology Development," OUP Catalogue, Oxford University Press, number 9780195188042.
    23. Jan Youtie & Maurizio Iacopetta & Stuart Graham, 2008. "Assessing the nature of nanotechnology: can we uncover an emerging general purpose technology?," The Journal of Technology Transfer, Springer, vol. 33(3), pages 315-329, June.
    24. Mowery, David & Rosenberg, Nathan, 1993. "The influence of market demand upon innovation: A critical review of some recent empirical studies," Research Policy, Elsevier, vol. 22(2), pages 107-108, April.
    25. Marco Caliendo & Sabine Kopeinig, 2008. "Some Practical Guidance For The Implementation Of Propensity Score Matching," Journal of Economic Surveys, Wiley Blackwell, vol. 22(1), pages 31-72, February.
    26. Guerzoni, Marco & Raiteri, Emilio, 2015. "Demand-side vs. supply-side technology policies: Hidden treatment and new empirical evidence on the policy mix," Research Policy, Elsevier, vol. 44(3), pages 726-747.
    27. Aschhoff, Birgit & Sofka, Wolfgang, 2009. "Innovation on demand--Can public procurement drive market success of innovations?," Research Policy, Elsevier, vol. 38(8), pages 1235-1247, October.
    28. Franco Malerba & Richard Nelson & Luigi Orsenigo & Sidney Winter, 2007. "Demand, innovation, and the dynamics of market structure: The role of experimental users and diverse preferences," Journal of Evolutionary Economics, Springer, vol. 17(4), pages 371-399, August.
    29. Maryann P. Feldman & Ji Woong Yoon, 2012. "An empirical test for general purpose technology: an examination of the Cohen--Boyer rDNA technology," Industrial and Corporate Change, Oxford University Press and the Associazione ICC, vol. 21(2), pages 249-275, April.
    30. Uwe Cantner & Simone Vannuccini, 2012. "A New View of General Purpose Technologies," Jena Economics Research Papers 2012-054, Friedrich-Schiller-University Jena.
    31. repec:adr:anecst:y:2008:i:91-92:p:11 is not listed on IDEAS
    32. David, Paul A, 1990. "The Dynamo and the Computer: An Historical Perspective on the Modern Productivity Paradox," American Economic Review, American Economic Association, vol. 80(2), pages 355-361, May.
    33. Joshua Lerner, 1994. "The Importance of Patent Scope: An Empirical Analysis," RAND Journal of Economics, The RAND Corporation, vol. 25(2), pages 319-333, Summer.
    34. David C. Mowery, 2011. "Federal Policy and the Development of Semiconductors, Computer Hardware, and Computer Software: A Policy Model for Climate Change R&D?," NBER Chapters, in: Accelerating Energy Innovation: Insights from Multiple Sectors, pages 159-188, National Bureau of Economic Research, Inc.
    35. Geroski, P. A., 2000. "Models of technology diffusion," Research Policy, Elsevier, vol. 29(4-5), pages 603-625, April.
    36. Jean O. Lanjouw & Mark Schankerman, 1999. "The Quality of Ideas: Measuring Innovation with Multiple Indicators," NBER Working Papers 7345, National Bureau of Economic Research, Inc.
    37. Alberto Abadie, 2005. "Semiparametric Difference-in-Differences Estimators," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 72(1), pages 1-19.
    38. Manuel Trajtenberg & Rebecca Henderson & Adam Jaffe, 1997. "University Versus Corporate Patents: A Window On The Basicness Of Invention," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 5(1), pages 19-50.
    39. Foray, Dominique, 1997. "The dynamic implications of increasing returns: Technological change and path dependent inefficiency," International Journal of Industrial Organization, Elsevier, vol. 15(6), pages 733-752, October.
    40. Foray, D. & Mowery, D.C. & Nelson, R.R., 2012. "Public R&D and social challenges: What lessons from mission R&D programs?," Research Policy, Elsevier, vol. 41(10), pages 1697-1702.
    41. Harhoff, Dietmar & Scherer, Frederic M. & Vopel, Katrin, 2003. "Citations, family size, opposition and the value of patent rights," Research Policy, Elsevier, vol. 32(8), pages 1343-1363, September.
    42. James Heckman & Hidehiko Ichimura & Jeffrey Smith & Petra Todd, 1998. "Characterizing Selection Bias Using Experimental Data," Econometrica, Econometric Society, vol. 66(5), pages 1017-1098, September.
    43. Kenneth Carlaw & Richard Lipsey, 2011. "Sustained endogenous growth driven by structured and evolving general purpose technologies," Journal of Evolutionary Economics, Springer, vol. 21(4), pages 563-593, October.
    44. Guido Cozzi & Giammario Impullitti, 2010. "Government Spending Composition, Technical Change, and Wage Inequality," Journal of the European Economic Association, MIT Press, vol. 8(6), pages 1325-1358, December.
    45. Mowery, David C. & Nelson, Richard R. & Martin, Ben R., 2010. "Technology policy and global warming: Why new policy models are needed (or why putting new wine in old bottles won't work)," Research Policy, Elsevier, vol. 39(8), pages 1011-1023, October.
    46. Dirk Czarnitzki & Katrin Hussinger & Cédric Schneider, 2011. "Commercializing academic research: the quality of faculty patenting," Industrial and Corporate Change, Oxford University Press and the Associazione ICC, vol. 20(5), pages 1403-1437, October.
    47. Flanagan, Kieron & Uyarra, Elvira & Laranja, Manuel, 2011. "Reconceptualising the 'policy mix' for innovation," Research Policy, Elsevier, vol. 40(5), pages 702-713, June.
    48. Heide Fier & Andreas Pyka, 2012. "Is It Worth All the Trouble? An Assessment of the Economic Value of Firm Patent Applications with Shared Intellectual Property Rights in the Biotechnology Industry," International Studies in Entrepreneurship, in: David B. Audretsch & Erik E. Lehmann & Albert N. Link & Alexander Starnecker (ed.), Technology Transfer in a Global Economy, edition 127, chapter 0, pages 123-142, Springer.
    49. Bronwyn H. Hall, 2005. "A Note on the Bias in Herfindahl-Type Measures Based on Count Data," Revue d'Économie Industrielle, Programme National Persée, vol. 110(1), pages 149-156.
    50. Mowery, David C., 2012. "Defense-related R&D as a model for “Grand Challenges” technology policies," Research Policy, Elsevier, vol. 41(10), pages 1703-1715.
    51. Michael Lechner, 2008. "A Note on the Common Support Problem in Applied Evaluation Studies," Annals of Economics and Statistics, GENES, issue 91-92, pages 217-235.
    52. Jean O. Lanjouw & Mark Schankerman, 2004. "Patent Quality and Research Productivity: Measuring Innovation with Multiple Indicators," Economic Journal, Royal Economic Society, vol. 114(495), pages 441-465, April.
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    7. Christoph March & Ina Schieferdecker, 2021. "Technological Sovereignty as Ability, Not Autarky," CESifo Working Paper Series 9139, CESifo.
    8. Uyarra, Elvira & Zabala-Iturriagagoitia, Jon Mikel & Flanagan, Kieron & Magro, Edurne, 2020. "Public procurement, innovation and industrial policy: Rationales, roles, capabilities and implementation," Research Policy, Elsevier, vol. 49(1).
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    11. Gaétan de Rassenfosse & Adam Jaffe & Emilio Raiteri, 2019. "The procurement of innovation by the U.S. government," PLOS ONE, Public Library of Science, vol. 14(8), pages 1-11, August.
    12. Paolo Castelnovo & Gelsomina Catalano & Francesco Giffoni & Matteo Landoni, 2024. "The outcomes of public procurements: an empirical analysis of the Italian space industry," The Journal of Technology Transfer, Springer, vol. 49(1), pages 367-399, February.
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    19. Serenella Caravella & Francesco Crespi, 2021. "The role of public procurement as innovation lever: evidence from Italian manufacturing firms," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 30(7), pages 663-684, October.
    20. Castelnovo, Paolo, 2022. "Innovation in private and state-owned enterprises: A cross-industry analysis of patenting activity," Structural Change and Economic Dynamics, Elsevier, vol. 62(C), pages 98-113.
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    23. Andrea Bastianin & Paolo Castelnovo & Massimo Florio & Anna Giunta, 2022. "Big science and innovation: gestation lag from procurement to patents for CERN suppliers," The Journal of Technology Transfer, Springer, vol. 47(2), pages 531-555, April.

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