Economic transformations had similar character, involving agricultural reforms, banks, transport and industry's nationalization and also introduction of the monopoly in foreign trade in all communist countries. Moreover, first plans related to social and political developments were almost the same. Everybody accepted the USSR's concept concerning building the grounds of socialism, which caused introduction of uniform system of economic plans. The processes of industrialization, electrification and creating productive co-operatives in the villages, which took place in 1949 - 1955, everywhere were similar.

The process of villages' socializing was the most difficult. In all countries peasants did not agree for collectivization for a long time. Collectivization progresses were different in different countries. In 1955 collective farms and productive co-operatives occupied: 75% of cultivated fields in Albania, 63,6% in Bulgaria, 53,6% in Czechoslovakia, 52,6% in Hungary, 40,9% in Rumania, 33,3% in GDR and 22,7% in Poland.

After declining of Marshall plan, the USSR and communist countries made new economic contracts. In 1950 commercial exchange among them was: 52% of turnover of foreign trade in Czechoslovakia, 59% in Poland, 61% in Hungary, 83% in Rumania and 88% in Bulgaria.

In this way in January 1949 that the representatives of Bulgaria, Czechoslovakia, Poland, Rumania, Hungary and USSR called into being the Council for Mutual Economic Aid in Moscow. Later the same year Albania was included in this organization and in 1950 also GDR. The council was open for all these countries which would accept the principles of co-operation. A few times each year there were called meetings during which very important decisions were made. In November 1950 during III session it was decided that co-operation would be based on the system of old trade contracts. In 1949-1955 scientific and technical co-operation involved exchange of 24 thousand of specialists, 7037 projects, technical and technological documentation. In 1959 it was introduced a new statute of Council for Mutual Economic Aid and the scope of co-operation was widened radically, limiting economic independence of council's countries.