Objective Bayesian analysis for the multivariate skew-t model |
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Authors: | Antonio Parisi B Liseo |
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Institution: | 1.DEF,Università degli Studi di Roma “Tor Vergata”,Rome,Italy;2.MEMOTEF,Sapienza Università di Roma,Rome,Italy |
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Abstract: | We propose a novel Bayesian analysis of the p-variate skew-t model, providing a new parameterization, a set of non-informative priors and a sampler specifically designed to explore the posterior density of the model parameters. Extensions, such as the multivariate regression model with skewed errors and the stochastic frontiers model, are easily accommodated. A novelty introduced in the paper is given by the extension of the bivariate skew-normal model given in Liseo and Parisi (2013) to a more realistic p-variate skew-t model. We also introduce the R package mvst, which produces a posterior sample for the parameters of a multivariate skew-t model. |
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