More on the restricted Liu estimator in the logistic regression model |
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Authors: | Jibo Wu Yasin Asar |
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Institution: | 1. Key Laboratory of Group &2. Graph Theories and Applications, Chongqing University of Arts and Sciences, Chongqing, China;3. Department of Statistics, Necmettin Erbakan University, Konya, Turkey |
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Abstract: | ?iray et al. proposed a restricted Liu estimator to overcome multicollinearity in the logistic regression model. They also used a Monte Carlo simulation to study the properties of the restricted Liu estimator. However, they did not present the theoretical result about the mean squared error properties of the restricted estimator compared to MLE, restricted maximum likelihood estimator (RMLE) and Liu estimator. In this article, we compare the restricted Liu estimator with MLE, RMLE and Liu estimator in the mean squared error sense and we also present a method to choose a biasing parameter. Finally, a real data example and a Monte Carlo simulation are conducted to illustrate the benefits of the restricted Liu estimator. |
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Keywords: | Liu estimator Mean squared error matrix Restricted Liu estimator |
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