2025/12/5
Hossein Bevrani

Hossein Bevrani

Academic rank: Professor
ORCID: 0000-0003-4658-9095
Education: PhD.
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Faculty: Faculty of Science
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E-mail: hossein.Bevrani [at] uok.ac.ir
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Research

Title
New Almost Unbiased Estimators in Beta Regression Models with Application
Type
Presentation
Keywords
Almost unbiased Liu-type estimator, Beta regression, Liu-type estimator, Multicollinearity.
Year
2022
Researchers Solmaz Seifollahi ، Hossein Bevrani

Abstract

Multicollinearity is an issue in the beta regression models that causes the variance of the ML estimator to be inflated. The Liu-type estimator is an appealing shrinkage strategy for reducing the influence of the multicollinearity problem. In the beta regression model, we suggest an almost unbiased Liu-type estimator as well as a modified version of the Liu-type estimator. Using a Monte Carlo simulation study and real data illustration, we investigate the performance of the suggested estimators. According to the results, the suggested estimators can provide a considerable improvement over other competitive estimators.