ABSTRACT
In the general equilibrium approach (Walras, 1874), strategic interactions between economic actors are not taken into account. Contracts consist only of agreements relating to quantities and prices, where prices are found outside of the economic actors themselves, by a ‘commissaire priseur\ This key actor centralizes supplies and demands, forbids exchanges out of the equilibrium and is benevolent. He also forbids communication between economic actors explaining why prices are the only element needed for economic actors to make their decision. Problems of coordination are all corrected without the use of contracts.
