4 papers
Skew-elliptical copula based mixed models for non-Gaussian longitudinal data with application to an HIV-AIDS study
Subhajit Chattopadhyay
This study was sparked by an extensive longitudinal dataset focusing on HIV CD4 T cell counts from Livingstone district, Zambia. Analysis of the corresponding histogram plots r…
Modeling temporal dependency of longitudinal data: use of multivariate geometric skew-normal copula
Subhajit Chattopadhyay
Use of copula for the purpose of modeling dependence has been receiving considerable attention in recent times. On the other hand, search for multivariate copulas with desirable de…
Factor copula models for non-Gaussian longitudinal data
Subhajit Chattopadhyay
This article presents factor copula approaches to model temporal dependency of non-Gaussian (continuous/discrete) longitudinal data. Factor copula models are canonical vine copulas…
Finite mixture copulas for modeling dependence in longitudinal count data
Subhajit Chattopadhyay
Dependence modeling of multivariate count data has garnered significant attention in recent years. Multivariate elliptical copulas are typically preferred in statistical literature…