2 papers
stat.ME2026
Mixture-of-Finite-Mixtures Wishart Model for Clustering Covariance Matrices with an Application to Brain Functional Connectivity
Zongyu Li, Stefano Castruccio, Zhiyong Zhang
Data represented as covariance-type matrices arise in many fields, including brain functional connectivity and diffusion tensor imaging. We develop the MFM-Wishart, a Bayesian mode…
stat.ME2025
Modelling Skewed and Heavy-Tailed Errors in Bayesian Mediation Analysis
Zongyu Li, Mark Steel, Zhiyong Zhang
Traditional mediation models in both the frequentist and Bayesian frameworks typically assume normality of the error terms. Violations of this assumption can impair the estimation…