During the period between 1929 and 1953, the United States occupational pay ratios and earning inequality is declined, mainly across World War II (Ober 1948, Phelps Brown 1977, Williamson and Lindert 1980, Goldin and Margo 1922b). The evidence showed that the condition of income inequality was occurrence in that period. Moreover, the problem of income inequality is declined. But, the problem of income inequality is existed. The government cannot spread the income distibution evenly. Many reasons obstructed the income distribution …showed first 75 words of 908 total…

…showed last 75 words of 908 total…power to improve the wages and benefits for their members. In this situation, the income inequality is happened between union¡¦s members and non-unions members. Although the demand for education workers was declined, education people still earn more than the uneducated people do because they have an expertise knowledge and experience. Migration is benefits for the young individuals. They can have a chance to prove themselves. Therefore, the movement of migration decreases the regional disparities.