The decomposition of regional wage differentials in Korea

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Abstract
This research note explains the wage differentials between the capital region and the non-capital region in Korea. It analyzes what proportions of the wage differential are due to differences in productivity-related labor characteristics and due to differences in how markets value the endowments of their workers. In a decomposition analysis, we find that approximately 26.9% of the wage differential is due to differences in productivity-related labor characteristics in the capital region. With respect to the endowments of the wage-determining characteristics, a substantial portion of the overall wage advantage of workers in the capital region can be explained by the higher average level of education. It is also found that the more detailed the occupational breakdown, the more of the wage differential that can be explained. These results suggest that the use of more detailed occupation classifications alleviates aggregation bias that may be a significant factor in coarser classification schemes.

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