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Identifying Age, Cohort and Period Effects in Scientific Research Productivity - Discussion and Illustration Using Simulated and Actual Data on French Physicists

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  • Hall, Bronwyn H.

    ()
    (UNU-MERIT)

  • Mairesse, Jacques

    ()
    (UNU-MERIT)

  • Turner, Laure

    ()
    (ENSAE)

Abstract

The identification of age, cohort (vintage), and period (year) effects in a panel of individuals or other units is an old problem in the social sciences, but one that has not been much studied in the context of measuring researcher productivity. In the context of a semi-parametric model of productivity where these effects are assumed to enter in an additive manner, we present the conditions necessary to identify and test for the presence of the three effects. In particular we show that failure to specify precisely the conditions under which such a model is identified can lead to misleading conclusions about the productivity-age relationship. We illustrate our methods using data on the publications 1986-1997 by 465 French condensed matter physicists who were born between 1936 and 1960.

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Bibliographic Info

Paper provided by United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT) in its series MERIT Working Papers with number 042.

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Date of creation: 2006
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Handle: RePEc:unm:unumer:2006042

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Keywords: scientific productivity; age; identification; panel data; bibliometrics.;

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References

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  1. Ernst R. Berndt & Zvi Griliches & Neal Rappaport, 1995. "Econometric Estimates of Prices Indexes for Personal Computers in the 1990s," NBER Working Papers 4549, National Bureau of Economic Research, Inc.
  2. Levin, Sharon G & Stephan, Paula E, 1991. "Research Productivity over the Life Cycle: Evidence for Academic Scientists," American Economic Review, American Economic Association, vol. 81(1), pages 114-32, March.
  3. Ashish Arora & Alfonso Gambardella, 1996. "Reputation and competence in publicly funded scientific research," Industrial Organization 9605002, EconWPA.
  4. Richard Blundell & Rachel Griffith & Frank Windmeijer, 1999. "Individual effects and dynamics in count data models," IFS Working Papers W99/03, Institute for Fiscal Studies.
  5. Jerry A. Hausman & Bronwyn H. Hall & Zvi Griliches, 1984. "Econometric Models for Count Data with an Application to the Patents-R&D Relationship," NBER Technical Working Papers 0017, National Bureau of Economic Research, Inc.
  6. Caroline Lanciano-morandat & Hiroatsu Nohara, 2003. "The New Production of Young Scientists (PhDs) A Labour Market Analysis in International Perspective," DRUID Working Papers 03-04, DRUID, Copenhagen Business School, Department of Industrial Economics and Strategy/Aalborg University, Department of Business Studies.
  7. Paula E. Stephan, 1996. "The Economics of Science," Journal of Economic Literature, American Economic Association, vol. 34(3), pages 1199-1235, September.
  8. Andrea Bonaccorsi & Cinzia Daraio, 2003. "A robust nonparametric approach to the analysis of scientific productivity," Research Evaluation, Oxford University Press, vol. 12(1), pages 47-69, April.
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Cited by:
  1. Corts, Kenneth S. & Lederman, Mara, 2009. "Software exclusivity and the scope of indirect network effects in the U.S. home video game market," International Journal of Industrial Organization, Elsevier, vol. 27(2), pages 121-136, March.
  2. Toole, Andrew A. & Czarnitzki, Dirk, 2007. "Life Scientist Mobility from Academe to Industry: Does Academic Entrepreneurship Induce a Costly ?Brain Drain? on the Not-for-Profit Research Sector?," ZEW Discussion Papers 07-072, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
  3. Martin, Ludivine, 2009. "Understanding the implementation of e-business strategies: Evidence from Luxembourg," MPRA Paper 13645, University Library of Munich, Germany.
  4. Van Landeghem, Bert, 2012. "A test for the convexity of human well-being over the life cycle: Longitudinal evidence from a 20-year panel," Journal of Economic Behavior & Organization, Elsevier, vol. 81(2), pages 571-582.
  5. Erik Biørn & Simen Gaure & Simen Markussen & Knut Røed, 2013. "The rise in absenteeism: disentangling the impacts of cohort, age and time," Journal of Population Economics, Springer, vol. 26(4), pages 1585-1608, October.
  6. Ebner, André, 2013. "A micro view on home equity withdrawal and its determinants: Evidence from Dutch households," Journal of Housing Economics, Elsevier, vol. 22(4), pages 321-337.
  7. Michele Pezzoni & Valerio Sterzi & Francesco Lissoni, 2009. "Career progress in centralized academic systems: social capital and institutions in France and Italy," KITeS Working Papers 026, KITeS, Centre for Knowledge, Internationalization and Technology Studies, Universita' Bocconi, Milano, Italy, revised 2009.
  8. Czarnitzki, Dirk & Glänzel, Wolfgang & Hussinger, Katrin, 2009. "Heterogeneity of patenting activity and its implications for scientific research," Research Policy, Elsevier, vol. 38(1), pages 26-34, February.
  9. Michael Rauber & Heinrich Ursprung, 2006. "Evaluation of researchers : a life cycle analysis of German academic economists," Working Papers of the Research Group Heterogenous Labor 06-08, Research Group Heterogeneous Labor, University of Konstanz/ZEW Mannheim.
  10. Aditi Mehta & Marc Rysman & Tim Simcoe, 2006. "Identifying the Age Profile of Patent Citations," Boston University - Department of Economics - Working Papers Series WP2006-022, Boston University - Department of Economics.
  11. Pop-Silaghi, Monica & Jude, Cristina & Alexa, Diana & Litan, Cristian, 2012. "Do business and public sector research and development expenditures contribute to economic growth in central and eastern European countries? A dynamic panel estimation," Economics Discussion Papers 2012-4, School of Economics, Kingston University London.
  12. Lerner, Josh & Strömberg, Per & Sörensen, Morten, 2009. "Private Equity and Long-Run Investment: The Case of Innovation," SIFR Research Report Series 66, Institute for Financial Research.
  13. Sidonia von Ledebur, 2009. "Patent Productivity of German Professors over the Life Cycle," Working Papers on Innovation and Space 2009-03, Philipps University Marburg, Department of Geography.
  14. Claudia R. Sahm, 2007. "Stability of risk preference," Finance and Economics Discussion Series 2007-66, Board of Governors of the Federal Reserve System (U.S.).
  15. Jeffrey L. Furman & Scott Stern, 2006. "Climbing Atop the Shoulders of Giants: The Impact of Institutions on Cumulative Research," NBER Working Papers 12523, National Bureau of Economic Research, Inc.
  16. Landeghem Bert van, 2011. "A Test for the Convexity of Human Well-Being over the Life Cycle: Longitudinal Evidence from a 20-Year Panel," Research Memorandum 043, Maastricht University, Maastricht Research School of Economics of Technology and Organization (METEOR).

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