In contrast with the nominal convergence, the real convergence in the process of accession to the European Single market is a complex process and still not clarified enough from the methodology point of view.

The convergence process became increasingly important for the EU since Euro was adopted. The single European market and the Economic and Monetary Union generated - in an objective and necessary way - a high interdependence among the national economies, and, in the same time, new qualitative, competitive and economic performing requirements for each and every member state.

Essentially, the real convergence reflects the interdependence among the uniqueness of the European market and the specificity of the national markets, and, as a consequence, with no space left for identifying rules and indicators that could reflect the way the national economies harmonize in order to systemically form another economy – the European economy.