ESTIMATION OF INCOME DISTRIBUTION BETWEEN DIFFERENT POPULATION GROUPS IN RUSSIA FOR 2019
The problem of stratification of society by income is currently quite acute in the development of the Russian economy. In this regard, one of the important tasks of the public administration system in Russia should be to overcome social inequality in the country. In other words, the success of public policy depends to some extent on the distribution of income among the population groups in the country. Therefore, indicators that assess the degree of differentiation are important for analyzing the income differentiation of the population. One of the methods for estimating income differentiation between different population groups is the Lorentz curve. The Lorentz curve is a statistical relationship between the share of income that falls on different percentage groups of the population. This article estimates the distribution of total income among 20 percent of the population in Russia for 2019. For this purpose, the Lorentz curve is constructed, i.e. a graphical representation of the relationship between the share of income that falls on different percentage groups of the population. The Gini coefficient was found to quantify the degree of income inequality. The Gini coefficient is a statistical measure of economic equality. To find the Gini coefficient, an analytical alignment of the Lorentz curve was performed using regression analysis and the area of a curved trapezoid was found using the integral calculus of a function of one variable.