“…This situation required a better explanation of this factor. As a result, economists proposed a whole group of endogenous models, in which the assumptions about the occurrence of permanent economies of scale were revoked and the importance of knowledge in the form of human, financial, technological or public capital was included (Uppenberg, 2009;Agenor and Neanidis, 2015). In these processes, the effect of diffusion was taken into account, undermining the possibility of rapid convergence of economic systems, pointing to rather clear difficulties in the process of "catching up" and overcoming structural weaknesses.…”