A modified Kakwani measure for health inequality
We propose simple modifications for the Kakwani tax progressivity measure that make it suitable for evaluating access inequality for medical services. Our modification is to measure inequality using the ratio of the concentration index to the Gini coefficient instead of the difference between them. We also propose a measure using the Gini coefficient or concentration index of consumption expenditure as the denominator in the modified measure as an alternative type of modified measure. This measure can also be interpreted as the income/consumption expenditure elasticity evaluated at the mean. Additionally, we propose a decomposition method using expenditure components and provide an empirical example with Japanese data. Copyright Fukushige et al.; licensee Springer. 2012
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Volume (Year): 2 (2012)
Issue (Month): 1 (December)
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- Erreygers, Guido, 2009. "Correcting the Concentration Index: A reply to Wagstaff," Journal of Health Economics, Elsevier, vol. 28(2), pages 521-524, March.
- Fukushige, Mototsugu, 1989. "A new approach to the economic inequality based upon the permanent income hypothesis," Economics Letters, Elsevier, vol. 29(2), pages 183-187.
- Kakwani, Nanok C, 1977. "Measurement of Tax Progressivity: An International Comparison," Economic Journal, Royal Economic Society, vol. 87(345), pages 71-80, March.
- Hai Zhong, 2009. "Extensions to decomposition of the redistributive effect of health care finance," Health Economics, John Wiley & Sons, Ltd., vol. 18(10), pages 1176-1187.
- Gerdtham, U. -G. & Johannesson, M. & Lundberg, L. & Isacson, D., 1999. "A note on validating Wagstaff and van Doorslaer's health measure in the analysis of inequalities in health," Journal of Health Economics, Elsevier, vol. 18(1), pages 117-124, January.
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