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, 2006.
"Correcting the Concentration Index,"
2006027, University of Antwerp, Faculty of Applied Economics.
- 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, Nanak & Wagstaff, Adam & van Doorslaer, Eddy, 1997. "Socioeconomic inequalities in health: Measurement, computation, and statistical inference," Journal of Econometrics, Elsevier, vol. 77(1), pages 87-103, March.
- Bilger, Marcel, 2008. "Progressivity, horizontal inequality and reranking caused by health system financing: A decomposition analysis for Switzerland," Journal of Health Economics, Elsevier, vol. 27(6), pages 1582-1593, December.
- 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.
- M. Kamrul Islam & Ulf-G. Gerdtham & Philip Clarke & Kristina Burström, 2010. "Does income-related health inequality change as the population ages? Evidence from Swedish panel data," Health Economics, John Wiley & Sons, Ltd., vol. 19(3), pages 334-349.
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