Ahiakpor, Ferdinand, Camara Kwasi Obeng, and William Gabriel Brafu-Insaidoo. 2011. “Impact of Import Liberalization on Aggregate Imports and Tariff Revenue in Ghana: Impact of Import Liberalization on Aggregate Imports and Tariff Revenue in Ghana”. Oguaa Journal of Social Sciences 6 (1):115-40. https://journal.ucc.edu.gh/index.php/ojoss/article/view/595.