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Robust linear mixed effects models with scale mixtures of skew-normal distributions


The objective of this project is to present an inferential Bayesian study in linear and nonlinear mixed models using more robust distributions than the skew-normal distribution, that is, using the class of scale of mixture of skew-normal distributions. The new model will be referred as SMSN-LMM. Moreover, diagnostics studies will be presented based on the divergence measure of Kullback--Leibler, like discussed in Lachos, Bandyopadhyay and Dey (2011). In the estimation process, a Gibbs sampler will be used with implementation in R, C++ and WinBUGS. The purpose of this project is to contribute positively to the development in the statistical research field, creating new results in models with practical interest, extending and complementing some of the skew-normal results found, for example, Lachos, Bandyopadhyay and Dey (2011) and others. (AU)

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