“Examining Households’ Willingness to Pay for a Reliable and Sustainable Urban Water Supply Using Interval Regression Analysis: The Case of Addis Ababa”. Ethiopian Journal of Economics 28, no. 1 (September 1, 2020): 49–98. Accessed April 21, 2026. https://ethiopianjournalofeconomics.org/index.php/EJE/article/view/206.