Akande Raifu, Isiaka, Oluwafemi Mathew Adeboje, Emmanuel Olubowale Obijole, and Oyeleke O. Famade. “Testing Gender and Race Non-Linear Unemployment Invariance Hypothesis in South Africa: Evidence from Threshold Regression”. African Journal of Economic Review 13, no. 1 (March 6, 2025): 1–25. Accessed September 23, 2026. https://www.ajol.info/index.php/ajer/article/view/290589.