When Does Cost System Sophistication Improve Financial Performance? The Moderating Role of Service Diversity. International Journal of Financial, Administrative and Economic Sciences, [S. l.], v. 5, n. 9, 2026. DOI: 10.59992/IJFAES.2026.v5n9p15. Disponível em: https://vsrp.co.uk/index.php/ijfaes/article/view/1905. Acesso em: 10 oct. 2026.