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arXiv 1809.03031stat.COecon.EM
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高维贝叶斯动态变量选择

Bayesian dynamic variable selection in high dimensions

Gary Koop, Dimitris Korobilis

摘要:

提出了一种变分贝叶斯算法,用于时变参数(TVP)模型的后验和预测推理。在这种情况下,我们指定了一个新的动态变量/模型选择策略的TVP动态回归模型中存在大量的预测。该策略允许在单个时间段内评估哪些预测因子与预测因变量相关(或不相关)。新的算法进行了评估,数值模拟使用合成数据,其计算优势。使用美国的宏观经济数据,我们发现,回归模型,结合了随时间变化的参数与信息,在许多预测有可能改善预测的价格通胀的替代预测模型。

英文摘要:

This paper proposes a variational Bayes algorithm for computationally efficient posterior and predictive inference in time-varying parameter (TVP) models. Within this context we specify a new dynamic variable/model selection strategy for TVP dynamic regression models in the presence of a large number of predictors. This strategy allows for assessing in individual time periods which predictors are relevant (or not) for forecasting the dependent variable. The new algorithm is evaluated numerically using synthetic data and its computational advantages are established. Using macroeconomic data for the US we find that regression models that combine time-varying parameters with the information in many predictors have the potential to improve forecasts of price inflation over a number of alternative forecasting models.

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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