Performance of Proposed Ridge – PCA Estimators: Simulation Evidence and Real Data Applications. International Journal of Development Mathematics (IJDM), [S. l.], v. 3, n. 1, p. 135–149, 2026. DOI: 10.62054/ijdm/0301.11. Disponível em: https://ijdm.org.ng/index.php/Journals/article/view/285.. Acesso em: 28 jun. 2026.