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A new model selection procedure for finite mixture regression models

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  • Conglian Yu
  • Xiyang Wang

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.

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  • Conglian Yu & Xiyang Wang, 2020. "A new model selection procedure for finite mixture regression models," Communications in Statistics - Theory and Methods, Taylor & Francis Journals, vol. 49(18), pages 4347-4366, September.
    • Handle: RePEc:taf:lstaxx:v:49:y:2020:i:18:p:4347-4366
    DOI: 10.1080/03610926.2019.1601222
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