“Using Dummy Variables in Improving the Simple Linear Regression Model for the Ratio of Consumption to the National Income in Iraq during the Period (1970-1994)” (2012) Al-Nahrain Journal of Science, 15(3), pp. 167–172. Available at: https://anjs.edu.iq/index.php/anjs/article/view/842 (Accessed: 17 May 2024).