Multivariate Birnbaum-Saunders distribution based on a skewed distribution and associated EM-estimation. (English) Zbl 07692848
Summary: We develop here a multivariate generalization of Birnbaum-Saunders (BS) distribution based on the multivariate skew-normal distribution. Some distributional characteristics and properties are presented, as well as a simple and efficient EM algorithm for the iterative computation of the maximum likelihood (ML) estimates of model parameters, through the hierarchical representation of the proposed model. The standard errors of the maximum likelihood estimates are calculated from the observed Fisher information matrix. Moreover, by using the tools, we present a log-linear regression model, where the the ML estimates are once again obtained using an EM algorithm. Finally, simulation studies and two applications to real data sets are presented for illustrating the model and the inferential results developed here.
Keywords:
Birnbaum-Saunders distribution; EM algorithm; marginal and conditional distributions; skew-normal distributionReferences:
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