الجومرد أثيل عبد الجبار, and القهواجي نزار صديق. “The Determinants of Total Factor Productivity Growth: An Analytical Study of a Cross Section of Countries for the Period (2003-2016)”. Journal of Economics and Administrative Sciences 25, no. 115 (December 1, 2019): 356–384. Accessed March 31, 2025. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/1831.