A Sovereign Debts and Gdp in Piigs Countries: A Panel Smooth Transition Approach Mustapha Djaballah University of M'sila: Universite Mohamed Boudiaf M'sila https://orcid.org/0000-0003-4950-2936 Research Article Keywords: PIIGS countries, sovereign debts, External debt, PSTR Model, Cross-sectional dependence Posted Date: April 24th, 2024 DOI: https://doi.org/10.21203/rs.3.rs-4177941/v1 License:   This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License