Equations du commerce international

[fre] Les équations (C) établissent des relations entre les élasticités de consommation et les importations de trois biens dans un cadre statique ; les équations (T) admettent au contraire l'existence du progrès technique, et reçoivent des inter­prétations économiques simples lorsque les biens considérés sont « indépendants » (théorèmes 2 et 3). Les difficultés et la portée d'une estimation de ces équations sont abordées en conclusion. [eng] Equations of international trade . . It is a question of establishing relationships between different variables concerning international trade, which could be used as a basis for a test of the neo-classical model. If neither the production possibility set nor the indiffference curves are known, we are lead to prove Slutsky type equations of symmetry. They are theoretically applicable to any two or three goods from the set of exchanged products ; this gives them a high degree of generality. Equations (C) establish relationships between the elasticities of consumption and the importations of three goods info a static System ; on the other hand, equations (T) allow the existence of technical progress and give simple economie interpretation when the goods under consideration are « independent ». The difficulties and the understanding of an estimation of these equations are dealt with in the conclusion.