Statistical Simulation
Estimation of Fixed Parameters in Negative Binomial Mixed Model Using Shrinkage Estimators

Zahra Zandi; Hossein Bevrani; Reza Arabi Belaghi

Volume 1, Issue 2 , June 2023, , Pages 99-124

  ‎In this paper‎, ‎we consider the problem of parameter estimation in {color{blue} negative binomial mixed model} when it is suspected that some of the fixed parameters may be restricted to a subspace via linear shrinkage‎, ‎{color{blue} preliminary test}‎, ‎shrinkage {color{blue} ...  Read More

Semiparametric Ridge Regression for Longitudinal Data

mozhgan taavoni

Volume 1, Issue 1 , December 2022, , Pages 159-170

  This paper considers an extension of the linear mixed model, called semiparametric mixed effects model, for longitudinal data, when multicollinearity is present. To overcome this problem, a new mixed ridge estimator is proposed while the nonparametric function in the semiparametric model is approximated ...  Read More