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分配公平与运行效率的互补效应——基于动态时间一致性的养老改革
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TitleThe Complementary Effect Between Equity and Efficiency——Pension Reform Based on Time Consistency Principle  
作者邹铁钉  
AuthorZou Tieding  
作者单位浙江大学经济学院 
OrganizationCollege of Economics and Interdisciplinary Center for Social Sciences ,Zhejiang University 
作者Emailzoutieding@163.com 
中文关键词公平 效率 互补效应 养老保险 时间一致性 
Key WordsEquity; Efficiency; Complementary Effect; Pension; Time Consistency 
内容提要本文运用动态时间一致性模型,从人口结构、技术进步以及资本市场的动态变化角度,分析了养老保险制度在分配公平和运行效率之间的互补效应,并利用中国的数据对中国养老保险体系的动态时间一致性进行了经验检验和动态预测。模型研究发现,动态时间一致性原则的本质就是要在分配公平和运行效率之间实现互补效应的最大化,一项养老改革只有在同时增加社会福利和个人投资收益的条件下,才符合动态时间一致性原则。经验检验和动态预测结果显示,当前和未来30多年,中国向基金制彻底转轨的时机并未成熟,继续坚持以现收现付制为主体 的统账结合制养老保险体系符合动态时间一致性原则。此外,投资收益率和社会福利增量数据在近年和未来30多年的变化趋势显示,虽然现收现付制仍是占优策略,但其相对优势却在逐年削弱,人口结构、劳动生产率以及资本市场的相对变化情况,已不容许大幅调高现收现付制的比例,进行小幅调整或维持现状不变才是最优策略。 
AbstractEmploying a dynamic time consistency model,this paper analyses the complementary effect between equity and efficiency for pension system.During the analysis , demographic structure、technical progress and capital markets will be considered.And then we will give a test to the consistent of China’s pension system in the past thirty years with Chinese data.Report shows that, the aim of pension reform under dynamic time consistency principle,which was to maximize the complementary effect between equity and efficiency.Only there is an increasing both in social welfare and individual revenue,the reform which will be consistent with dynamic time consistency principle.The empirical test and performance prediction showed that, under the situation of present and 30 years from now,the transition to full-funded system is still not ripe.In order to cope with dynamic time consistency principle ,for the whole pension system,the main stress should be put on commission account as past.Besides,the change tendency in capital ratios and social welfare showed that,though a dominant strategy,the relative advantage of pay-as-you-go system gradually eroded.Considering the situation of population、labor productivity and capital market,it was not allowed to raise the share of pay-as-you-go system, a condition where everything just be adjusted smoothly or remains the same may be the best choice. 
文章编号WP531 
登载时间2013-09-13 
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