The national economies and the world economic circuit are found in an interdependence relation: on the one hand the world economic circuit is multiplied and diversified in accordance to the development degree of the national economies, at the level of the world division of the labour, to the directions of orientation of the international political conjuncture, and on the other hand the greater the degree of the internal economical development, the more intense the external economic connections of the particular country are, fact which reveals the greatest weight in the world economic circuit held by the high developed countries.

the payment balance, the foreign currency exchange rates, the internal disequilibrium, the external disequilibrium