Open access
Jul 2026
A New Efficient Biased Estimator in Overdispersed Count Regression for Effectively Handling Multicollinearity in COVID-19 Data from Saudi Arabia
An improved shrinkage estimator for the NBRM is proposed, referred to as a novel class of negative binomial Liu-type estimator, aiming to reduce estimation variance while maintaining stable parameter estimates under conditions of multicollinearity.
E. H. Hafez, A. Hammad, R. Aldallal et al.
· Statistics, Optimization &am... · 0 citations