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A new model selection procedure for finite mixture regression models

Conglian Yu and Xiyang Wang

Communications in Statistics - Theory and Methods, 2020, vol. 49, issue 18, 4347-4366

Abstract: In this article, we propose a new penalized-likelihood method to conduct model selection for finite mixture of regression models. The penalties are imposed on mixing proportions and regression coefficients, and hence order selection of the mixture and the variable selection in each component can be simultaneously conducted. The consistency of order selection and the consistency of variable selection are investigated. A modified EM algorithm is proposed to maximize the penalized log-likelihood function. Numerical simulations are conducted to demonstrate the finite sample performance of the estimation procedure. The proposed methodology is further illustrated via real data analysis.

Date: 2020
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DOI: 10.1080/03610926.2019.1601222

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