How do non-performing loans affect productivity? Evidence from Tunisian banks using a parametric hyperbolic distance function. CIMEGS–SEJ (Socio-Economic Journal), [S. l.], v. 1, n. 1, p. 40–87, 2025. Disponível em: https://journal.cimeg.ca/index.php/cimegs/article/view/12. Acesso em: 25 aug. 2026.