Study, The Contribution Rate Adjustment Mechanism Based On The Average Life Expectancy Increased Pension Personal Accounts

China's present endowment insurance system is built on the partial accumulative mode which includes social pool and personal account. Individual account doesn't have the function of intra-generational income redistribution and belongs to private goods in nature. The contribution rate level of personal account not only affects citizen's disposal income presently, also affects their future basic life and expectation. Through the investment of pension fund for maintenance and increment of value, the contribution rate of personal account plays a big role in individual income distribution and national economy. Life expectancy at retirement is one of key factors related closely with contribution rate of personal account. According to current pension insurance system, the contribution rate of personal account can only provide the retired with ten year's basic life security. As average expectation of life increases, life expectancy at retirement is growing gradually and its average value of male and female employees is almost seventeen years at present. If the contribution rate of personal account were not properly adjusted by life expectancy at retirement, the retired facing longevity risk will fall into poor state. The low level of the existing contribution rate of personal account will not guarantee the basic life of the retired as life expectancy at retirement grows, will make security net function of social insurance perform inefficiently and will enable it not to coordinate with pension reform under the trend of aging population. Thus, it is of theoretical value and practical significance to study the adjustment to the contribution rate of personal account based on life expectancy at retirement.Based on existed research, this article aims to calculate the contribution rate of personal account of fifty years under the increasing life expectancy at retirement and analyses the bearing ability of employees shouldering this contribution rate. On the base of quantitative and qualitative methods, this article focuses on the necessity and feasibility analysis and puts forward the theoretical and policy basis of adjustment to the contribution rate of personal account by life expectancy at retirement. It seeks to provide with reasonable suggestions for the improvement of pension reform in China and better serve for social practice.Through establishing the contribution rate model of personal account, extracting the demographic data and statistics yearbook's data, utilizing statistics and econometrics...