Measuring Uncertainty in PPP Aggregation: A Study of GEKS and Weighted CPD Approaches Using African Data. International Journal of Development Mathematics (IJDM), [S. l.], v. 2, n. 3, p. 140–151, 2025. DOI: 10.62054/ijdm/0203.10. Disponível em: https://ijdm.org.ng/index.php/Journals/article/view/218.. Acesso em: 28 jun. 2026.