Journal of Chuxiong Normal University ›› 2020, Vol. 35 ›› Issue (3): 14-19.

• Mathematics • Previous Articles     Next Articles

A Study on Construction and Evaluation of a Model for Lorentz Curve

ZHU Yong1, HU Yanling2   

  1. 1. School of Economics & Management,Chuxiong Normal University,Chuxiong,Yunnan Province 675000;
    2. School of Economics & Management,Harbin University of Science & Technology,Harbin,Heilongjiang Province 150080
  • Received:2020-01-10 Online:2020-05-20 Published:2020-12-28

Abstract: Lorentz curve is closely related to the fairness of income distribution in China.Income distribution has long been the focus of attention of government departments,ordinary people and scholars.Therefore,this paper breaks the frame of exponential and logarithmic discussion of Lorentz curve,constructs a new Lorentz curve model and uses MATLAB to fit data to get curve function.On this basis,three evaluation indexes,namely,mean square error (MSE),mean absolute error (MAE) and maximum absolute error (MAS),are used to evaluate Lorentz curve.Nine mature Lorentz curve models are compared and the results show that the new model is superior to the other eight of them in the three indicators of MSE,MAE and MAS,which makes it highly operable in academic research and practical application.

Key words: Lorentz curve, data fitting, construction, evaluation, MATLAB

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