Abiri A, Mahmoudzadeh Vashan M, Hakimpour H, Rezaei Far H. The Threshold Effects of External Debt on Sustainable Economic Growth Considering Heterogeneity in Regulatory Quality and Government Institutional Quality. JMBS. Published online July 1, 2026:1-15. Accessed February 19, 2026. https://journalmbs.com/index.php/jmbs/article/view/168