“…The Eurozone Member States converge and there are signs of increased integration, even though the Eurozone does not fulfill most of the OCA theory criteria (Barbosa and Alves, 2011). The convergence process in the EU has been confirmed by different studies (Jelnikar and Murmayer, 2006;Prochniak, 2004, 2007;Szeles and Marinescu, 2010;Stanišić et al, 2018;Rapacki and Próchniak, 2019;Stoica et al, 2019;Bisciari et al, 2020). However, economic convergence of the analyzed countries does not seem to be a homogeneous process (Cavenaile and Dubois, 2011;Grzelak and Kujaczinska, 2013;Benczes and Szent-Ivanyi, 2015) because the countries belong to different convergence clubs.…”