Comparison
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The healthiest group against all other groups |
Everyone against everyone |
Aggregation
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How are differences aggregated at the population level?
For bivariate health inequality measures, should the measures be sensitive to inherent ordering of another attribute (eg, income)?
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Unweighted addition of difference and sensitive to inherent ordering of attribute |
Weighted addition of health share and unweighted addition of difference |
Sensitivity to the mean |
Absolute measures are translation invariant, meaning that equal absolute difference implies equal degree of inequality, while the equal proportional increase makes inequality larger.
Relative measures are scale invariant, meaning that equal proportional difference implies equal degree of inequality, while the equal absolute addition reduces inequality.
Intermediate inequality measures consider equal proportional increase makes inequality bigger, while equal absolute addition decreases inequality.
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Translation invariant |
Scale invariant |
Sensitivity to the total population size |
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Insensitive |
Insensitive |
Subgroup considerations |
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Insensitive to the group size |
Decomposable |