KYEI-MENSAH, J. Purchasing Power Parity in Some African Countries Using a Nonlinear Panel Unit Root Test. Journal of Applied Business and Economics, [S. l.], v. 21, n. 7, 2019. Disponível em: https://articlearchives.co/index.php/JABE/article/view/886. Acesso em: 15 sep. 2025.