A note on the decomposability of inequality measures

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Frederic Chantreuil et al., « A note on the decomposability of inequality measures », HAL-SHS : économie et finance, ID : 10.1007/s00355-019-01183-9


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We propose a decomposition of inequality measures. By taking the example of the decomposition of income inequality by components, we show that this decomposition fits the definition of two elements: the sum of pure marginal contributions of income components and the sum of the pairwise interactions of all income components. This decomposition relies on the Shapley function and remains valid for a decomposition by subgroups and by components.

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