Lorenz curve is a case of concentration from that measured. These statistics apply to socio-economic variables are likely to be spread, such as the level of income, wages and profits. The distribution of the variables can be based on geographic areas, locations or categories. 
The objective is to observe and mediate as it divides the total of the variable of interest: 
between individuals in the population. Lorenz curve
Lorenz curve is the curve passing through point pairs where:
-
We can see that the cumulative relative frequency .
can also see that the distribution of individual values \u200b\u200bor the percentage of the total accumulated by individuals with an observed value
Another feature that strikes us is that both measures take values \u200b\u200bbetween 0 and 1. 
Properties:
Lorenz curve always starts at point (0.0) and ends at the point (1.1)
- is a rising curve.
- is always less than or equal to the diagonal that passes through the points (0.0) and (1.1).
- Therefore to make the curve representing the first line we represent (0.0) and (1.1) and then we represent each pair of points .
Lorenz curve has the following structure:
So the closer the curve to imply a more equal distribution digonal. And the more distant is less equal distribution in the distribution of the total.
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