A Gibbs sampler corresponding to a Group
Inverse-Gamma Gamma (GIGG) regression model with adjustment covariates.
Hyperparameters in the GIGG prior specification can either be fixed by the
user or can be estimated via Marginal Maximum Likelihood Estimation.
Jonathan Boss, Jyotishka Datta, Xin Wang, Sung Kyun Park, Jian Kang, Bhramar