A measure of income inequality within a population, ranging from zero for complete equality, to one if one person has all the income. It is defined as the area between the Lorenz Curve and the diagonal, divided by the total area under the diagonal.

The Gini Coefficient is a measure of income distribution whereby a score of zero indicates perfect equality, and 100 indicates that all national income is enjoyed by one person.

Measures the extent to which the distribution of income (or, in some cases, consump- tion expenditures) among individuals or households within an economy deviates from a perfectly equal dis- tribution. The coefficient ranges from 0 - meaning perfect equality - to 1 - complete inequality.

A measure of inequality of income or wealth in a population. The coefficient has values between 0 and 1, where 0 signifies perfect equality (all individuals have the same share) and 1 represents complete inequality (one individual gets everything).

a measure of inequality (equal to twice the area between the 45 degree line and the Lorenz curve)

The Gini coefficient is a figure between 0 and 1, which can be multiplied by 100 to give a figure between 0 and 100. The same idea is being represented in both cases, with 0 representing perfect equality and 1 (or 100) representing perfect inequality.

A mathematical measurement of income distribution to compare changes over time or between countries and/or economic regions

The Gini coefficient is a precise way of measuring the position of the Lorenz Curve. To work out the Gini coefficient we measure the ratio of the area between the Lorenz Curve and the 45 degree line to the whole area below the 45 degree line. If the Lorenz Curve was the 45 degree line - then the value of the Gini Coefficient would be zero, but as the level of inequality grows so does the Gini Coefficient. In the most extreme possible scenario the Gini Coefficient would be 1. In the UK the figure is around 0.35 and during the 1980s grew as the level of inequality increased.

The Gini coefficient is a measure of inequality of a distribution. It is defined as a ratio with values between 0 and 1: the numerator is the area between the Lorenz curve of the distribution and the uniform (perfect) distribution line; the denominator is the area under the uniform distribution line. It was developed by the Italian statistician Corrado Gini and published in his 1912 paper "VariabilitÃ e mutabilitÃ " ("Variability and Mutability").