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Graphical Assistant Grouped Network Autoregression Model: A Bayesian Nonparametric Recourse

Author

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  • Yimeng Ren
  • Xuening Zhu
  • Xiaoling Lu
  • Guanyu Hu
Abstract
Vector autoregression model is ubiquitous in classical time series data analysis. With the rapid advance of social network sites, time series data over latent graph is becoming increasingly popular. In this article, we develop a novel Bayesian grouped network autoregression model, which can simultaneously estimate group information (number of groups and group configurations) and group-wise parameters. Specifically, a graphically assisted Chinese restaurant process is incorporated under the framework of the network autoregression model to improve the statistical inference performance. An efficient Markov chain Monte Carlo sampling algorithm is used to sample from the posterior distribution. Extensive studies are conducted to evaluate the finite sample performance of our proposed methodology. Additionally, we analyze two real datasets as illustrations of the effectiveness of our approach.

Suggested Citation

  • Yimeng Ren & Xuening Zhu & Xiaoling Lu & Guanyu Hu, 2024. "Graphical Assistant Grouped Network Autoregression Model: A Bayesian Nonparametric Recourse," Journal of Business & Economic Statistics, Taylor & Francis Journals, vol. 42(1), pages 49-63, January.
    • Handle: RePEc:taf:jnlbes:v:42:y:2024:i:1:p:49-63
    DOI: 10.1080/07350015.2022.2143784
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