A Bayesian Time Series Model of Multiple Structural Changes in Level, Trend, and Variance
水平、趋势与方差多重结构变化的贝叶斯时间序列模型AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确建模时间序列水平、趋势与方差的多重结构变化,并以美国实际利率及实际 GDP 为例。
水平、趋势与方差多重结构变化的贝叶斯时间序列模型AI 解读 ↓
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We consider a deterministically trending dynamic time series model in which multiple structural changes in level, trend, and error variance are modeled explicitly and the number, but not the timing, of the changes is known. Estimation of the model is made possible by the use of the Gibbs sampler. The determination of the number of structural breaks and the form of structural change is considered as a problem of model selection, and we compare the use of marginal likelihoods, posterior odds ratios, and Schwarz's Bayesian model-selection criterion to select the most appropriate model from the data. We evaluate the efficacy of the Bayesian approach using a small Monte Carlo experiment. As empirical examples, we investigate structural changes in the U.S. ex post real interest rate and in a long time series of U.S. real gross domestic product.
We study structural changes in multivariate time series by estimating and comparing stationary graphs of macroeconomic time series before and after an economic crisis, such as the Great Recession. Building on a latent time series framework called Orthogonally-rotated Univariate Time-series (OUT), we propose a shared-parameter framework-the spOUT autoregressive model (spOUTAR)-that jointly models two related multivariate time series and enables coherent Bayesian estimation of…
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