The change from a system of closed regionalism to a more open model had arisen out of the fact that the section of trading blocs that were created among the developing countries during the 1960s and 1970s were based on certain specific models such as those of import substitution as well as regional agreements coupled with the prevalence generally high external trade barriers. The positive aspects of such shifting is that there has been some restructuring of certain old agreements. The agreements tend to be more forward in their outward approach as well as show commitment in trying to advance international trade and commerce instead to trying to put a cap on it by way of strict control.
The Advent of Trade Blocks tend to draw in some parity between high-income industrial countries and developing countries with a much lower income base in that they tend to serve as equal partners under such a system. The concept of equal partners grew out of the concept of providing reinforcement to the economies to all the member countries. The various countries then agree upon the fact that they will help economies to maintain the balance of trade between and prohibit the entry of other countries in their trade process.
An important example would be the North American Free Trade Area, formed in 1994 when the Canada – US Free Trade Agreement was extended to Mexico. Another vibrant example would entail as to how EU has formed linkages incorporating the transition economies of Eastern Europe through the Europe Agreements. It has signed agreements with the majority of Mediterranean countries by highly developing the EU-Turkey customs union and a Mediterranean policy. Vysegrád four is a group of states co-operating in order to achieve higher economic results