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). Al-Nahrain Journal of Science, [S. l.], v. 15, n. 3, p. 167–172, 2012. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/842. Acesso em: 27 apr. 2025.