Optimal model averaging estimator for multinomial logit models

Rongjie Jiang, Liming Wang and Yang Bai

Statistical Theory and Related Fields, 2022, vol. 6, issue 3, 227-240

Abstract: In this paper, we study optimal model averaging estimators of regression coefficients in a multinomial logit model, which is commonly used in many scientific fields. A Kullback–Leibler (KL) loss-based weight choice criterion is developed to determine averaging weights. Under some regularity conditions, we prove that the resulting model averaging estimators are asymptotically optimal. When the true model is one of the candidate models, the averaged estimators are consistent. Simulation studies suggest the superiority of the proposed method over commonly used model selection criterions, model averaging methods, as well as some other related methods in terms of the KL loss and mean squared forecast error. Finally, the website phishing data is used to illustrate the proposed method.

Date: 2022
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DOI: 10.1080/24754269.2022.2037204

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