ABSTRACT
Among the methods of measurement of inequality, the Gini coefficient is used more and more frequently and will replace other statistic measurements which are less reliable in dealing with the social context because they rely mainly on the amount of income produced and not the actual quality of life of families and individuals. The Gini coefficient is calculated as the difference between the straight line, which indicates the constant of the wealth in a given country, and the curve, which indicates the actual distribution: the area that lies between the straight line and the curve is the measure of inequality. The quantification of the actual concentration of income in dictated by the Lorenz curve, introduced by Max O. Lorenz in 1905, which differs from the previous line: this one takes the shape of a belly with an increasing tendency towards the bottom when the distribution of wealth is more diversified, and then rise to peak at the end point.
