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arXiv 2005.06851econ.EMstat.AP
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时变参数随机波动均值模型的动态收缩

Dynamic shrinkage in time-varying parameter stochastic volatility in mean models

Florian Huber, Michael Pfarrhofer

摘要:

成功的预测模型在简约性和灵活性之间取得了平衡。这通常通过采用适当的收缩先验来实现,该收缩先验惩罚模型复杂性,但也奖励模型拟合。在本说明中,我们通过引入最先进的收缩技术来修改Chan(2017)中提出的随机波动率均值(SVM)模型,该技术允许收缩程度随时间变化。使用实时通货膨胀预测练习,我们发现,采用更灵活的先验分布的几个关键参数略有改善预测性能,为美国(US),英国(UK)和欧元区(EA)。比较样本结果表明,我们提出的模型产生定性相似的见解,该模型的原始版本。

英文摘要:

Successful forecasting models strike a balance between parsimony and flexibility. This is often achieved by employing suitable shrinkage priors that penalize model complexity but also reward model fit. In this note, we modify the stochastic volatility in mean (SVM) model proposed in Chan (2017) by introducing state-of-the-art shrinkage techniques that allow for time-variation in the degree of shrinkage. Using a real-time inflation forecast exercise, we show that employing more flexible prior distributions on several key parameters slightly improves forecast performance for the United States (US), the United Kingdom (UK) and the Euro Area (EA). Comparing in-sample results reveals that our proposed model yields qualitatively similar insights to the original version of the 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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