소득이동성의 추이변화와 인구고령화의 영향 분석 = Longitudinal Changes in Income Mobility and Effect of Aging Population

다국어 초록 (Multilingual Abstract)

This paper estimates the income mobility and its longitudinal changes for the most recent decade (2007~2015) by developing a new mobility measure in a continuous framework unlike the precedent studies whose results depend heavily on prespecified income categories, using the panel data set of the National Survey of Tax and Benefit. It also analyzes the effect of aging population and tests the structural change in income mobility over time. The empirical results show that the income mobility drastically dropped in the worldwide financial economic crisis period of 2008 and its decreasing trend was sustained even after the period until recently. The statistical testing results show that there were five significant structural decreases between the two consecutive years in the income mobility for the entire test period. The test is also repeated for the subsample excluding the young generation under age 30 and the elderly generations over age 55, most of whom are about to retire: the test finds that there were two significant decreases in income mobility. These findings all combinedly imply that the income mobility decreased significantly and frequently for the last decade in Korea: it was induced not only by the structural change in active labor market but also by the aging population.