The study defines the three types of convergence – institutional, nominal and real ones –, the connection among them and their main measurement indicators. 

The main objective of the present approach is, first of all, to analyse the "transaction costs" concept and then to prove scientifically the relation transaction costs – institutions.

This paper focuses on the role of institutions in enhancing economic growth. Attention to the institutional environment has become increasingly common in economic history and it has deeply enriched our understanding of how economies develop through time. Economic development is no longer...