Direct link to map: http://upload.wikimedia.org/wikipedia/commons/thumb/5/55/Lorenz_Curve_-_Concentration_Area_-_es.svg/566px-Lorenz_Curve_-_Concentration_Area_-_es.svg.png
The Lorenz Curve is used to discuss concentration of suppliers, or firm, in a market. The horizontal axis is divided into as many pieces as there are suppliers. On the vertical axis are the market sales in percentage terms from 0 to 100. The Lorenz curve is a graph of the sales of all the firms to the right of each point on the horizontal axis.
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