Sanchez-Loor, Daniel Alejandro, and Manuel A. Zambrano-Monserrate. 2015. “Causality Analysis Between Electricity Consumption, Real GDP, Foreign Direct Investment, Human Development and Remittances in Colombia, Ecuador and Mexico”. International Journal of Energy Economics and Policy 5 (3):746-53. https://econjournals.com/index.php/ijeep/article/view/1271.