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养老金改革的生命周期效应:一种结构模型方法

The Life-Cycle Effects of Pension Reforms: A Structural Approach
Journal of the European Economic Association · 2023 · Claudio Daminato、Mario Padula

中文摘要

为评估养老金改革的生命周期福利效应,我们构建了一个涵盖储蓄、投资组合选择和退休决策的动态随机模型,并在其中对养老金制度进行了详尽刻画。利用意大利一系列养老金改革带来的外生变异,我们对模型进行识别和估计,随后用其分析不同养老金政策方案的影响。经验证的模型预测,社会保障财富对退休有较大影响;当家庭能够调整退休决策时,公共养老金财富与私人储蓄之间的抵消作用有所减弱。我们进一步发现,养老金改革具有重要的分配效应:家庭在工作生涯中越晚面临改革,其福利下降幅度越大。我们的研究发现对养老金政策的设计及其可能获得的支持具有启示意义。

Abstract

Abstract To assess the life-cycle welfare effects of pension reforms, we provide a dynamic stochastic model of saving, portfolio choice, and retirement featuring a rich characterisation of the pension system. Relying on the exogenous variation from a sequence of Italian pension reforms, we identify and estimate the model, which is then used to draw implications of alternative pension policies. The validated model predicts substantial social security wealth effects on retirement, with the offset between public pension wealth and private savings softened when households can adjust their retirement decisions. We further find important distributional effects of pension reforms, with households’ welfare decreasing more the later in the working life they face the reform. Our findings have implications for the design of pension policies and the support they might generate.
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