Using mixtures in seemingly unrelated linear regression models with non-normal errors

被引:10
|
作者
Galimberti, Giuliano [1 ]
Scardovi, Elena [1 ]
Soffritti, Gabriele [1 ]
机构
[1] Univ Bologna, Dept Stat Sci, Via Belle Arti 41, I-40126 Bologna, Italy
关键词
EM algorithm; Gaussian mixture model; Hessian matrix; Score vector; LEAST-SQUARES ESTIMATORS; DIRECT MONTE-CARLO; MAXIMUM-LIKELIHOOD; BAYESIAN-ANALYSIS; PREDICTION; EQUATIONS; INFERENCE; SELECTION;
D O I
10.1007/s11222-015-9587-0
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Seemingly unrelated linear regression models are introduced in which the distribution of the errors is a finite mixture of Gaussian distributions. Identifiability conditions are provided. The score vector and the Hessian matrix are derived. Parameter estimation is performed using the maximum likelihood method and an Expectation-Maximisation algorithm is developed. The usefulness of the proposed methods and a numerical evaluation of their properties are illustrated through the analysis of simulated and real datasets.
引用
收藏
页码:1025 / 1038
页数:14
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