"Using Some Methods Estimation of Hybrid Model For Unbalanced Panel Data : Simulation Study". Al Kut Journal of Economics and Administrative Sciences 18, no. 62 (يونيو 10, 2026): 1380–1402. تاريخ الوصول أغسطس 27, 2026. https://kjeas.uowasit.edu.iq/index.php/kjeas/article/view/1306.