Main Article Content


In this paper, we introduce the new biased estimator to deal with the problem of multicollinearity. This estimator is considered a modification of Two-Parameter Ridge-Liu estimator based on ridge estimation. Furthermore, the superiority of the new estimator than Ridge, Liu and Two-Parameter Ridge-Liu estimator were discussed. We used the mean squared error matrix (MSEM) criterion to verify the superiority of the new estimate.  In addition to, we illustrated the performance of the new estimator at several factors through the simulation study.


Multicollinearity Ridge estimator Liu estimator Two-Parameter Ridge-Liu estimator Modify of Two-Parameter Ridge-Liu estimator mean squared error matrix (MSEM).

Article Details

How to Cite
Omara, T. M. (2019). Modifying Two-Parameter Ridge Liu Estimator Based on Ridge Estimation. Pakistan Journal of Statistics and Operation Research, 15(4), 881-890.