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On correcting the concentration index for binary variables

Gustav Kjellsson, Ulf-G. Gerdtham
2013 Journal of Health Economics  
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
more » ... n. 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.
doi:10.1016/j.jhealeco.2012.10.012 pmid:23522656 fatcat:ajy2cxncn5gdriqz324e22uq2e