Income inequality is a serious social economic issue in many countries. The issue is deteriorated due to the complex social environment and demographic composition in the Unites States. This study focuses on the racial and gender factors which influence workers’ income. And the easy-qualified year of schooling and working-year are chosen as the other two factors. Basing on the Ordinary Least Square (OLS) analysis, the selected factors are qualified to understand their influence degree in income inequality. By comparing the coefficients of the factors, we find the inner relationships between the factors and income inequality. The precise results not only provide a chance for people to examine their income levels, but also help the government to develop fair policies.
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