Abiri , Ali, Mehdi Mahmoudzadeh Vashan, Hossein Hakimpour, and Hamid Rezaei Far. 2026. “The Threshold Effects of External Debt on Sustainable Economic Growth Considering Heterogeneity in Regulatory Quality and Government Institutional Quality”. Journal of Management and Business Solutions, July, 1-15. https://journalmbs.com/index.php/jmbs/article/view/168.