On correcting the concentration index for binary variables

Gustav Kjellsson · Ulf‐G. Gerdtham

218 citations0/0 files storedJournal of Health Economics

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Health disparities and outcomes Income, Poverty, and Inequality Public Health and Social Inequalities

Abstract

This article discusses measurement of socioeconomic inequalities in the prevalence of a health condition, in response to the recent exchange between Guido Erreygers and Adam Wagstaff, in which they discuss the merits of their own corrections to the frequently used concentration index. We first reconcile their debate and discuss the value judgments implicit in their indices. Next, we provide a formal definition of the previously undefined value judgment in Wagstaff's correction. Finally, we show empirically that the choice of index matters, as illustrated by comparisons between countries using data from the European Survey of Health, Ageing and Retirement.

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References

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2016Conindex: Estimation of Concentration Indices 2020Socio-economic inequalities in the multiple dimensions of access to healthcare: the case of South Africa 2017Assessing the impoverishing effects, and factors associated with the incidence of catastrophic health care payments in Kenya 2011The concentration index of a binary outcome revisited

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