Evaluation of the Factors Affecting Income Inequality

In the presentstudy,the evaluation of different economic factors’ impact on income inequality in Iran has been considered during the period 1363-1390. In order to achieve this, Auto-Regressive Distributed Lag method is used. The results indicate that the rate ofeconomic growth and inflation rate havenegative influence and income tax, labour productivity and gas and oil revenue has a positive influence on income equality.Also based on the results, it can be stated that the relationship between economic growth and income distribution confims Kuznets and Kaldor’s view. The structural stability tests indicate the estimated model is stable. In addition, according to calculated elasticities, it can be concluded that revenue fromincome tax has had the most effect on reducing incomeinequality in Iran during the mentioned period.