An usual practice that analyses data of individual income statistic is curve of Ci of tectonic so called Luo Lun, it depicts an income racily to allocate the prospect of not equal degree.

• 分析个人收入统计数据的一个通常做法是构造所谓的洛伦茨曲线,它生动地描绘出收入分配不均等程度的图景。