Fundamental shock selection in DSGE models

Fundamental shock selection in DSGE models
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DSGE 模型中的基本冲击选择

DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
Miguel León
Miguel León
中科院分区:
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文献类型:
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作者:
Filippo Ferroni;S. Grassi;Miguel León

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动态随机一般均衡模型通常假设存在某些结构性冲击,这些冲击会导致宏观经济波动。我们分析了引入非基本面冲击对DSGE模型参数估计的影响,并提出了一种选择驱动不确定性的结构性冲击的方法。我们发现,迫使非基本面结构性冲击的存在产生了向下的偏见,估计内部持续的模型。然后,我们展示了如何通过允许结构性冲击的协方差矩阵秩亏,使用先验的标准差,其支持包括零,可以减少这些失真。该方法使我们能够准确地选择基本冲击和估计模型参数的精度。最后,我们重新审视了行业标准的中等规模DSGE模型的经验证据,发现政府,价格和工资上涨冲击是非基本面的。
DSGE models are typically estimated assuming the existence of certain structural shocks that drive macroeconomic fluctuations. We analyze the consequences of introducing nonfundamental shocks for the estimation of DSGE model parameters and propose a method to select the structural shocks driving uncertainty. We show that forcing the existence of non-fundamental structural shocks produces a downward bias in the estimated internal persistence of the model. We then show how these distortions can be reduced by allowing the covariance matrix of the structural shocks to be rank deficient using priors for standard deviations whose support includes zero. The method allows us to accurately select fundamental shocks and estimate model parameters with precision. Finally, we revisit the empirical evidence on an industry standard medium-scale DSGE model and find that government, price, and wage markup shocks are non-fundamental.
DOI: --
发表时间: 1997-04
期刊: Statistica Sinica
影响因子: 1.4
作者:
E. George;R. McCulloch
通讯作者: E. George;R. McCulloch