Graphical representation of the Gini coefficient
The graph shows that the Gini coefficient is equal to the area marked A
divided by the sum of the areas marked A
, that is, Gini = A/(A + B)
. It is also equal to 2A
and to 1 − 2B
due to the fact that A + B = 0.5
(since the axes scale from 0 to 1).