IS THE CONVERGENCY HYPOTHESİS VALİD İN N11 COUNTRİES? NEW EVİDENCE WİTH PANEL FOURİER UNİT ROOT TEST. (2024). Third Sector Social Economic Review, 59(1), 503-518. https://doi.org/10.15659/3.sektor-sosyal-ekonomi.24.03.2156