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Intergenerational inequalities in GPs’ earnings: experience, time and cohort effects

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  • Brigitte Dormont
  • Anne-Laure Samson

Abstract

This paper analyses the regulation of ambulatory care and its impact on physicians' careers, using a representative panel of 6,016 French self-employed GPs over the years 1983 to 2004. The beginning of their activity is influenced by the regulated number of places in medical schools, named in France numerus clausus. We show that the policies aimed at manipulating the numerus clausus strongly affect physicians' permanent level of earnings. Our empirical approach allows us to identify experience, time and cohort effects in GPs' earnings. The estimated cohort effect is very large, revealing that intergenerational inequalities due to fluctuations in the numerus clausus are not negligible. GPs beginning during the eighties have the lowest permanent earnings: they faced the consequences of an unlimited number of places in medical schools in the context of a high density due to the baby-boom numerous cohorts. Conversely, the decrease in the numerus clausus led to an increase in permanent earnings of GPs who began their practice in the mid nineties. Overall, the estimated gap in earnings between "good" and "bad" cohorts may reach 25%. We performed a more thorough analysis of the earnings distribution to examine whether individual unobserved heterogeneity could compensate for average differences between cohorts. Our results about stochastic dominance between earnings distributions by cohort show that it is not the case.

Suggested Citation

  • Brigitte Dormont & Anne-Laure Samson, 2007. "Intergenerational inequalities in GPs’ earnings: experience, time and cohort effects," EconomiX Working Papers 2007-34, University of Paris Nanterre, EconomiX.
    • Handle: RePEc:drm:wpaper:2007-34
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    1. Fran??ois Bourguignon & Francisco H. G. Ferreira & Phillippe G. Leite, 2002. "Beyond Oaxaca-Blinder: Accounting for Differences in Household Income Distributions Across Countries," William Davidson Institute Working Papers Series 478, William Davidson Institute at the University of Michigan.
    2. Russell Davidson & Jean-Yves Duclos, 2000. "Statistical Inference for Stochastic Dominance and for the Measurement of Poverty and Inequality," Econometrica, Econometric Society, vol. 68(6), pages 1435-1464, November.
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    5. Shorrocks, Anthony F, 1983. "Ranking Income Distributions," Economica, London School of Economics and Political Science, vol. 50(197), pages 3-17, February.
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    Cited by:

    1. B. Dormont & A.‐L. Samson, 2008. "Medical demography and intergenerational inequalities in general practitioners' earnings," Health Economics, John Wiley & Sons, Ltd., vol. 17(9), pages 1037-1055, September.
    2. Brigitte Dormont & Anne-Laure Samson, 2008. "Medical Demography and Intergenerational inequalities in GPs' earnings," Post-Print halshs-00351781, HAL.

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    More about this item

    Keywords

    GPs; self-employed; longitudinal data; earnings; stochastic dominance.;
    All these keywords.

    JEL classification:

    • C2 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables
    • D63 - Microeconomics - - Welfare Economics - - - Equity, Justice, Inequality, and Other Normative Criteria and Measurement
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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