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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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  • Bronwyn Hall

    (Crest)

  • Jacques Mairesse

    (Crest)

  • Laure Turner

    (Crest)

Abstract

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

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Paper provided by Centre de Recherche en Economie et Statistique in its series Working Papers with number 2005-22.

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Length: 32
Date of creation: 2005
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Handle: RePEc:crs:wpaper:2005-22

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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. Paula E. Stephan, 1996. "The Economics of Science," Journal of Economic Literature, American Economic Association, vol. 34(3), pages 1199-1235, September.
  3. 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.
  4. 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.
  5. Richard Blundell & Rachel Griffith & Frank Windmeijer, 1999. "Individual effects and dynamics in count data models," IFS Working Papers W99/03, Institute for Fiscal Studies.
  6. Ashish Arora & Alfonso Gambardella, 1996. "Reputation and competence in publicly funded scientific research," Industrial Organization 9605002, EconWPA.
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Cited by:
  1. 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.
  2. Josh Lerner & Morten Sorensen & Per Strömberg, 2011. "Private Equity and Long‐Run Investment: The Case of Innovation," Journal of Finance, American Finance Association, vol. 66(2), pages 445-477, 04.
  3. 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.
  4. 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.
  5. 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 Memoranda 008, Maastricht : ROA, Research Centre for Education and the Labour Market.
  6. Martin, Ludivine, 2009. "Understanding the implementation of e-business strategies: Evidence from Luxembourg," MPRA Paper 13645, University Library of Munich, Germany.
  7. 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.
  8. 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.
  9. 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.).

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