Agu, Sunday Virtus, Lawrence Chike Azike, and U. Chris Kalu. “Education Human Capital Development and Per Capita Income in Nigeria: A Bivariate Granger Causality Analysis”. Social Science Research 8, no. 1 (April 9, 2023). Accessed November 23, 2024. https://journals.aphriapub.com/index.php/SSR/article/view/1929.