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

32 Pages Posted: 29 Jan 2006 Last revised: 31 Jul 2010

See all articles by Bronwyn H. Hall

Bronwyn H. Hall

University of California at Berkeley; National Bureau of Economic Research (NBER); Institute for Fiscal Studies (IFS); Max Planck Institute for Innovation and Competition

Jacques Mairesse

National Institute of Statistics and Economic Studies (INSEE) - Center for Research in Economics and Statistics (CREST); Maastricht University - United Nations and Maastricht Economic Research Institute on Innovation and Technology (UNU-MERIT); National Bureau of Economic Research (NBER)

Laure Turner

National Institute of Statistics and Economic Studies (INSEE) - National School for Statistical and Economic Administration (ENSAE)

Date Written: November 2005

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.

Suggested Citation

Hall, Bronwyn H. and Mairesse, Jacques and Turner, Laure, Identifying Age, Cohort and Period Effects in Scientific Research Productivity: Discussion and Illustration Using Simulated and Actual Data on French Physicists (November 2005). NBER Working Paper No. w11739. Available at SSRN: https://ssrn.com/abstract=842474

Bronwyn H. Hall (Contact Author)

University of California at Berkeley ( email )

549 Evans Hall #3880
Berkeley, CA 94720-3880
United States

HOME PAGE: http://emlab.berkeley.edu/users/bhhall/index.html

National Bureau of Economic Research (NBER)

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Institute for Fiscal Studies (IFS)

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Max Planck Institute for Innovation and Competition

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Germany

Jacques Mairesse

National Institute of Statistics and Economic Studies (INSEE) - Center for Research in Economics and Statistics (CREST) ( email )

15 Boulevard Gabriel Peri
Malakoff Cedex, 1 92245
France

Maastricht University - United Nations and Maastricht Economic Research Institute on Innovation and Technology (UNU-MERIT)

Keizer Karelplein 19
6211 TC Maastricht
Netherlands

National Bureau of Economic Research (NBER)

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

Laure Turner

National Institute of Statistics and Economic Studies (INSEE) - National School for Statistical and Economic Administration (ENSAE) ( email )

92245 Malakoff Cedex
France

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