关键词: 社会保障, 老年人口, 再分配效应, 差距

Abstract: Social security has an income distribution adjustment function. It plays an important role in regulating the economic income of the elderly population, who are the main subjects of pension and medical insurance. Based on the database of CHIP, this paper makes a macroscopic global measurement and micro-individual econometric analysis of the old-age income redistribution effect of social security by using the structural Gini coefficient and redistribution coefficient. The results show that the level of pension benefits and health care play an important role in redistributing the income of urban and rural elderly population, and the income redistribution effect of pension is higher. On the whole, social security has a positive effect on the redistribution of income in old age, but there are still many problems. Social security expenditure should be focused on the disadvantaged groups and the social security target targeting mechanism should be improved, so as to gradually bridge the income gap of the elderly population.

Key words: Social Security, Elderly Population, Redistribution Effect, Gap