Estimation of the Share of between-group Inequality in Total Inequality (Based on Occupational Groups in Iran)

Inequality is one of the basic problems of countries. So, it is very important to examine how income is distributed in a society. Therefore, many studies have been conducted in this regard, but in general, in the studies that used the common methods of calculating inequality, the inequality between different groups is ignored in determining the total inequality, therefore, researchers pay less attention to between-group inequality. In this study, in addition to calculating the inequality in Iran's occupational groups, the inequality between occupational groups has also been evaluated with the ANOVA coefficients approach. Since the measurement of inequality is normalized with these coefficients. For this purpose, household cost-income data during 2013-2019 in urban areas of Iran have been used. The results show that inequality has increased in the most occupational groups, but, it has been almost constant in the "administrative and clerical workers" and "artisans and workers in related occupations", and "administrative and clerical workers" has the best income distribution status and the "legislators, high-ranking officials and managers" has the highest level of inequality. Also, the results indicate that the share of inequality between occupational groups was approximately 50% and close to the share of inequality within groups.