TY - JOUR
T1 - Estimation of Lorenz Curve and Gini Coefficient by Parametric Method
TT - براورد منحنی لورنتس و ضریب جینی بهروش پارامتری
JF - srtc-ijoss
JO - srtc-ijoss
VL - 19
IS - 1
UR - http://ijoss.srtc.ac.ir/article-1-116-en.html
Y1 - 2008
SP - 1
EP - 14
KW - Functional forms
KW - Gini coefficient
KW - Least squares estimation
KW - Lorenz curve
KW - Maximum likelihood estimation
N2 - Abstract. Lorenz curve is an important tool to measure income inequality. Many indices are defined based on Lorenz curve to measure the inequality; Gini coefficient is one of them. In this paper, we introduce Lorenz curve and Gini coefficient and we estimate the unknown parameters of income probability distribution by the maximum likelihood method. Functional forms of the Lorenz curve are estimated via two methods and the best functional form is introduced. Finally, we estimate the Lorenz curve and the Gini coefficient based on the data of household income and expenditure survey of Iran 2005.
M3
ER -