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conindex: Estimation of concentration indices

Author

Listed:
  • Owen O’Donnell

    (Erasmus University Rotterdam)

  • Stephen O’Neill

    (London School of Hygiene and Tropical Medicine)

  • Tom Van Ourti

    (Erasmus University Rotterdam)

  • Brendan Walsh

    (City University London, UK)

Abstract

Concentration indices are frequently used to measure inequality in one variable over the distribution of another. Most commonly, they are applied to the measurement of socioeconomic-related inequality in health. We introduce the user-written command conindex, which provides point estimates and standard errors of a range of concentration indices. The command also graphs concentration curves (and Lorenz curves) and performs statistical inference for the comparison of inequality between groups. We offer an accessible introduction to the various concentration indices that have been proposed to suit different measurement scales and ethical responses to inequality. We also demonstrate the command’s capabil- ities and syntax by analyzing wealth-related inequality in health and health care in Cambodia. Copyright 2016 by StataCorp LP.

Suggested Citation

  • Owen O’Donnell & Stephen O’Neill & Tom Van Ourti & Brendan Walsh, 2016. "conindex: Estimation of concentration indices," Stata Journal, StataCorp LP, vol. 16(1), pages 112-138, March.
    • Handle: RePEc:tsj:stataj:v:16:y:2016:i:1:p:112-138
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