La loi des coûts comparatifs et la formation des prix internationaux chez Ricardo
Renaud DU TERTRE
This article attempts to show that Ricardo’s law of comparative costs provides an original and complete model, as opposed to the accounts of neoclassical economists. Ricardo’s approach comprises three parts. The first one shows that the country starts having an interest to participate in international trade when the terms of trade deviate from its internal relative costs. The second part establishes that the process of international trade is regulated by the adjustment of relative nominal wages, expressed in a common unit of account, in order to make exported prices comparable. The third part tries to demonstrate that the exchange rate and international terms of trade are determinate when the balance of payments of the given country realises an equilibrium state. Such mechanism is asserted here as it allows to underline the precarious and instable character of this equilibrium.
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