Bala, Muktar. “Ordered Logit Model, Proportional Odds Assumption and Marginal Effects: Demysfying the Derivational Steps”. Lapai Journal of Economics 2, no. 2 (December 30, 2018): 50–64. Accessed July 22, 2024. https://ojs.ibbujournals.com.ng/index.php/lje/article/view/7.