Ewugi, M. S., M. Z. A. Karim, and R. Abdul-Hakim. “Shiroro Hydro Electricity Dam and Happiness of Host Community: An Evaluation Using Propensity Score Matching Analysis”. International Journal of Economics and Financial Issues, vol. 6, no. 3, July 2016, pp. 1106-113, https://www.econjournals.com/index.php/ijefi/article/view/2260.