Sobre el Premi Nobel d'Economia concedit a George A. Akerlof, A. Michael Spence i Joseph E. Stiglitz

Abstract

Normally the classical model of supply and demand is based on a market with perfectly standardised and homogenous goods with almost perfect competiton, that is a great number of buyers and sellers. Microeconomics has advanced by the continued relaxation of these simplifying suppositions. First the theory of imperfect competition, oligopoly and monopoly. Then the homogeneity of the good. It is obvious when shopping the great hetereogenity everywhere, the differentiation and variety of goods. The third classical characteristic is perfect information which is what the winners have overturned. When information is imperfect, incomplete and asymetrical, the rules of the game change. Information is incomplete and imperfect in unequal proportions for the two parts participating in a transaction, buyer and seller, insurer and insured, or in any contract.