针对设计矩阵Xi呈病态时的半相依线性回归系统,提出了系统参数βi的一种c-k型改进估计,并证明了这种估计在均方误差意义下的若干优良性质.
For the two seemingly unrelated regression systems, improved c-k estimators of the parameters are presented when the design matrix is ill-conditioned. Under the MSE criterion, some properties of the improved c-k estimators are given.