conindex: Estimation of Concentration Indices

Owen O'Donnell, Tom Van Ourti, S O'Neil, B Walsh

Research output: Contribution to journalArticleAcademicpeer-review

139 Citations (Scopus)

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 a user-written Stata 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. The article offers an accessible introduction to the various concentration indices that have been proposed to suit different measurement scales and ethical responses to inequality. The command’s capabilities and syntax are demonstrated through analysis of wealth-related inequality in health and healthcare in Cambodia.
Original languageEnglish
Pages (from-to)112-138
Number of pages27
JournalStata Journal
Volume16
Issue number1
Publication statusPublished - 2016

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