CAPITAL STRUCTURE OPTIMISATION AND WACC MINIMISATION IN REGIONAL INDUSTRIAL ENTERPRISES: AN ECONOMETRIC APPROACH. American Journal of Research in Humanities and Social Sciences, [S. l.], v. 48, p. 1–4, 2026. Disponível em: https://americanjournal.org/index.php/ajrhss/article/view/3541. Acesso em: 17 may. 2026.