Variational Bayesian inference for the Latent Position Cluster Model for network data

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Title: Variational Bayesian inference for the Latent Position Cluster Model for network data
Authors: Salter-Townshend, MichaelMurphy, Thomas Brendan
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Date: Jan-2013
Online since: 2021-10-11T14:29:28Z
Abstract: A number of recent approaches to modeling social networks have focussed on embedding the nodes in a latent “social space”. Nodes that are in close proximity are more likely to form links than those who are distant. This naturally accounts for reciprocal and transitive relationships which are commonly found in many network datasets. The Latent Position Cluster Model is one such model that also explicitly incorporates clustering by modeling the locations using a finite Gaussian mixture model. Observed covariates and sociality random effects may also be modeled. However, inference for the model via MCMC is cumbersome and thus scaling to large networks is a challenge. Variational Bayesian methods offer an alternative inference methodology for this problem. Sampling based MCMC is replaced by an optimization that requires many orders of magnitude fewer iterations to converge. A Variational Bayesian algorithm for the Latent Position Cluster Model is therefore developed and demonstrated.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: Elsevier
Journal: Computational Statistics & Data Analysis
Volume: 57
Issue: 1
Start page: 661
End page: 671
Copyright (published version): 2012 Elsevier
Keywords: Social network analysisVariational BayesLatent position cluster model
DOI: 10.1016/j.csda.2012.08.004
Language: en
Status of Item: Peer reviewed
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Appears in Collections:Mathematics and Statistics Research Collection
CASL Research Collection

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