“…Second, within this particular strand of research more controversy arises when the conditional convergence of EU states is addressed. As a parenthesis, we might point out that, in general, the conditional convergence analyses share a common root relative to the employed set of variables; to wit, next to the ubiquitous initial level of GDP per capita, the evolution of prices, economic openness and investment level are members of the basic set (Borys et al, 2008;Ertan Ozguzer and Ogus-Binatli, 2016;Siljak and Nagy, 2018). However, naturally, within the existing literature, to this common set, various other economic, social and political variables are added.…”