Weighted shrinkage estimators of normal mean matrices and dominance properties
Weighted shrinkage estimators of normal mean matrices and dominance properties
复制标题
正态平均矩阵和优势特性的加权收缩估计器
DOI:
10.1016/j.jmva.2022.105138
复制
发表时间:
2023
影响因子:
1.6
通讯作者:
Kubokawa Tatsuya
中科院分区:
文献类型:
--
作者:
Yuasa Ryota;Kubokawa Tatsuya
In the estimation of the mean matrix in a multivariate normal distribution, the Efron–Morris estimator and the James–Stein estimator are two well-known minimax procedures, where the former is matricial shrinkage and the latter is scalar shrinkage. The methods for combining the two estimators with random weight functions are addressed. For deriving weight functions, the paper suggests the two methods. One is the minimization of a part of the unbiased estimator of the risk function, and the other is the empirical Bayes approach. The resulting weighted shrinkage estimators are shown to be minimax, and the extension to the case of an unknown covariance matrix is developed.
DOI:
10.11329/jjss1970.20.191
发表时间:
1990
期刊:
Journal of the Japan Statistical Society. Japanese issue
影响因子:
--
作者:
Yoshihiko Konno
通讯作者:
Yoshihiko Konno
DOI:
--
发表时间:
2009
期刊:
Journal of Multivariate Analysis 100
影响因子:
--
作者:
Tsukuma;H.
通讯作者:
H.
影响因子:
0.8
作者:
Hisayuki Tsukuma
通讯作者:
Hisayuki Tsukuma