“A Comparison of Parameters Estimation Methods for the Negative Binomial Regression Model under Multicollinearity Problem by Using Simulation”. Journal of Economics and Administrative Sciences 25, no. 110 (February 1, 2019): 466. Accessed April 28, 2024. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/1599.