Article,

Sampling correlation matrices in Bayesian models with correlated latent variables

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Journal of Computational and Graphical Statistics, 15 (4): 880--896 (December 2006)
DOI: 10.1198/106186006X160050

Abstract

Hierarchical model specifications using latent variables are frequently used to reflect correlation structure in data. Motivated by the structure of a Bayesian multivariate probit model, we demonstrate a parameter-extended Metropolis-Hastings algorithm for sampling from the posterior distribution of a correlation matrix. Our sampling algorithms lead directly to two readily interpretable families of prior distributions for a correlation matrix. The methodology is illustrated through a simulation study and through an application with repeated binary outcomes on individuals from a study of a suicide prevention intervention.

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