Bayes Inference via Gibbs Sampling of Autoregressive Time Series Subject to Markov Mean and Variance Shifts
均值与方差发生马尔可夫状态切换的自回归时间序列:Gibbs 抽样贝叶斯推断AI 解读 ↓
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均值与方差发生马尔可夫状态切换的自回归时间序列:Gibbs 抽样贝叶斯推断AI 解读 ↓
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The authors examine autoregressive time series models subject to regime switching. A Bayesian framework is develope d in which the unobserved.states, one for each time point, are treated as missing data and then analyzed using the Gibbs sampler. This approac h is straightforward because the conditional posterior distribution of the parameters given the states, and the conditional posterior distribution of the states given the parameters, are amenable to simulation. The authors are able to generate marginal posterior distributions for all parameters of interest. Posterior distributio ns of the states, future observations, and the residuals, averaged over the parameter space, are also obtained. They illustrate the methodol ogy in several examples.
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比例时间序列的 Beta-GAM 隐 Markov 模型
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贝叶斯马尔可夫转换部分降秩回归
Reduced-Rank (RR) regression is a powerful dimensionality reduction technique but it overlooks any possible group configuration among the responses by assuming a low-rank structure on the entire coefficient matrix. Moreover, the temporal change of the relations between predictors and responses in time series induce a possibly time-varying grouping structure in the responses. To address these limitations, a Bayesian Markov-switching partial RR (MS-PRR) model is proposed,…