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CALF-SBM: A covariate-assisted latent factor stochastic block model

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  • Louit, Sydney
  • Clark, Evan A.
  • Gelbard, Alexander H.
  • Vivek, Niketna
  • Yan, Jun
  • Zhang, Panpan

Abstract

We propose a novel network generative model extended from the standard stochastic block model by concurrently utilizing observed node-level information and accounting for network-enabled nodal heterogeneity. The proposed model is so called covariate-assisted latent factor stochastic block model (CALF-SBM). The inference for the proposed model is done in a fully Bayesian framework. The primary application of CALF-SBM in the present research is focused on community detection, where a model-selection-based approach is employed to estimate the number of communities which is practically assumed unknown. To assess the performance of CALF-SBM, an extensive simulation study is carried out, including comparisons with multiple classical and modern network clustering algorithms. Lastly, the paper presents two real data applications, respectively based on an extremely new network data demonstrating collaborative relationships of otolaryngologists in the United States and a traditional aviation network data containing information about direct flights between airports in the United States and Canada.

Suggested Citation

  • Louit, Sydney & Clark, Evan A. & Gelbard, Alexander H. & Vivek, Niketna & Yan, Jun & Zhang, Panpan, 2025. "CALF-SBM: A covariate-assisted latent factor stochastic block model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 667(C).
    • Handle: RePEc:eee:phsmap:v:667:y:2025:i:c:s0378437125001888
    DOI: 10.1016/j.physa.2025.130536
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    References listed on IDEAS

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