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Solving Heterogeneous-agent Models By Projection And Perturbation

机译:通过投影和摄动求解非均质模型

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摘要

The paper proposes a numerical solution method for general equilibrium models with a continuum of heterogeneous agents that combines elements of projection and of perturbation methods. The basic idea is to solve first for the stationary solution of the model, without aggregate shocks but with fully specified idiosyncratic shocks. Afterwards one computes a first-order perturbation of the solution in the aggregate shocks. This approach allows to include a high-dimensional representation of the cross-sectional distribution in the state vector. The method is applied to a model of household saving with uninsurable income risk and liquidity constraints. Techniques are discussed to reduce the dimension of the state space such that higher order perturbations are feasible.
机译:本文提出了一种一般均衡模型的数值解法,该模型具有一个连续的非均质代理,该非均质代理结合了投影方法和摄动方法的要素。基本思想是首先求解模型的平稳解,而不要加总冲击,但要完全指定特质冲击。然后,计算总冲击中解的一阶扰动。该方法允许在状态向量中包括截面分布的高维表示。该方法应用于具有不可保险的收入风险和流动性约束的家庭储蓄模型。讨论了减小状态空间尺寸的技术,以便更高阶的扰动是可行的。

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