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arXiv 1209.0253stat.MEstat.AP
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非线性结构时间序列模型的贝叶斯推断

Bayesian inference for nonlinear structural time series models

Jamie Hall, Michael K. Pitt, Robert Kohn

摘要:

本文讨论了一种部分自适应粒子滤波器,用于状态转移密度不能用封闭形式表示的非线性结构计量经济状态空间模型的似然估计。该滤波器在状态转移方程中产生扰动,并允许条件扰动分布中有多个模式。粒子滤波器产生对似然性的无偏估计,因此可以用于在粒子马尔可夫链蒙特卡罗框架中执行贝叶斯推断。我们的经验表明,当信号噪声比高,新的过滤器可以比标准的粒子滤波器更有效,在这个意义上,它需要更少的粒子,以提供相同的精度。新的过滤器被应用到几个模拟和真实的例子,特别是一个动态随机一般均衡模型。

英文摘要:

This article discusses a partially adapted particle filter for estimating the likelihood of a nonlinear structural econometric state space models whose state transition density cannot be expressed in closed form. The filter generates the disturbances in the state transition equation and allows for multiple modes in the conditional disturbance distribution. The particle filter produces an unbiased estimate of the likelihood and so can be used to carry out Bayesian inference in a particle Markov chain Monte Carlo framework. We show empirically that when the signal to noise ratio is high, the new filter can be much more efficient than the standard particle filter, in the sense that it requires far fewer particles to give the same accuracy. The new filter is applied to several simulated and real examples and in particular to a dynamic stochastic general equilibrium model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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