College of Mathematics and Physics, Chongqing University, Chongqing 400030, China
Copyright © 2009 Litong Wang and Hu Yang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Kantorovich inequality is a very useful tool to study the inefficiency of the ordinary
least-squares estimate with one regressor. When regressors are more than one
statisticians have to extend it. Matrix, determinant, and trace versions of it have been
presented in the literature. In this paper, we provide matrix Euclidean norm Kantorovich