On an asymptotically more efficient estimation of the single-index model

被引:37
作者
Chang, Ziqing
Xue, Liugen [2 ]
Zhu, Lixing [1 ]
机构
[1] Hong Kong Baptist Univ, Dept Math, Hong Kong, Hong Kong, Peoples R China
[2] Beijing Univ Technol, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
The single-index model; Asymptotical efficiency; Least squares estimation; SEMIPARAMETRIC ESTIMATION; EMPIRICAL LIKELIHOOD;
D O I
10.1016/j.jmva.2010.02.005
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
In this note, we revisit the single-index model with heteroscedastic error, and recommend an estimating equation method in terms of transferring restricted least squares to unrestricted least squares: the estimator of the index parameter is asymptotically more efficient than existing estimators in the literature in the sense that it is of a smaller limiting variance. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:1898 / 1901
页数:4
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