haku: @indexterm science / yhteensä: 202
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| Tekijä: | Hall, B.H. Mairesse, J. Turner, L. |
| Otsikko: | Identifying age, cohort, and period effects in scientific research productivity: discussion and illustration using simulated and actual data on Frech physicists |
| Lehti: | Economics of innovation and new technology
2007 : JAN-MAR, VOL. 16:1-2, p. 159-177 |
| Asiasana: | science academic research productivity panel data |
| Vapaa asiasana: | biobliometrics |
| Kieli: | eng |
| Tiivistelmä: | This article takes a fresh standpoint on a much examined topic: it studies the identification of age, vintage and year effects in a panel of individuals or other units from the viewpoint of measuring researcher productivity. The presence of each of the three effects are tested semi-parametrically using data on the publications in 1986-1997 of 464 French physicists born in the time span of 1936-1960. The paper emphasizes the interconnectedness of identifying an age-related productivity effect or the presence or location of a productivity peak and what a researcher presupposes about the variation of vintage and time. If the conditions under which a semi-parametrical model of productivity is identified are not sufficiently specified, a researcher may end up with fallacious conclusions about the productivity-age relationship. |
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