What it means

For income, a Gini coefficient of 0 means everyone has the same income; a higher number generally means incomes are more unequal. Some reports use a scale from 0 to 1, others from 0 to 100. A score of 0.3 on the first scale is 30 on the second. The same idea can be used for wealth, but a Gini for income and one for wealth answer different questions. One number cannot show exactly who has gained or lost.

Example

If two reports give Gini figures of 0.30 and 30 for the same income data, they may be reporting the same result on different scales. Check the scale and what was measured before comparing them.

Why it matters

It helps compare inequality across places or years, but should be read alongside measures that show what is happening to particular groups.

Also known as

Gini index

Related terms

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