Markets can be said to overcome ignorance in two senses. First, in an imaginary world of economic equilibrium, market prices can signal to consumers how they may alter their behavior so as to conform to supply and demand conditions of which they are ignorant. This is a point that was underscored by F.A. Hayek and, now, by Jeffrey Friedman. But the more important manner in which markets overcome ignorance was identified by Hayek's mentor, Ludwig von Mises, and is not mentioned (...) by Friedman: when market prices are not perfectly aligned to supply and demand conditions (and they never are), they present profit opportunities to entrepreneurs who are alert to make such discoveries. Their profit‐motivated actions then reallocate resources in a pattern more efficiently reflecting the true supply and demand conditions. It is this way of overcoming ignorance that most clearly separates the market arena from the political arena, because no corresponding corrective discovery process exists in politics. (shrink)

A spate of recent attacks on the rationality assumption in economic theory is noticed. Some of these attacks are fresh and, in many ways, original, but the central ideas underlying them are not new. They appear to have been provoked by the direction in which much of mainstream economics has been moving in recent years. On the other hand, it is suggested here, certain developments in contemporary economics, associated particularly with the revival of interest in the Austrian paradigm, offer afresh (...) understanding of the way in which the rationality assumption, its role in economics properly understood, is able to meet these old?new attacks. (shrink)

A spate of recent attacks on the rationality assumption in economic theory is noticed. Some of these attacks are fresh and, in many ways, original, but the central ideas underlying them are not new. They appear to have been provoked by the direction in which much of mainstream economics has been moving in recent years. On the other hand, it is suggested here, certain developments in contemporary economics, associated primarily with the revival of interest in the Austrian paradigm, offer a (...) fresh understanding of the way in which the rationality assumption, its role in economics properly understood, is able to meet these old-new attacks.On assiste depuis quelques années à une recrudescence des critiques à l'égard de l'hypothèse de rationalité employée en théorie économique. Certaines de ces critiques sont nouvelles, et originales à bien des égards, mais les idées essentielles qui les sous-tendent sont anciennes. Ces critiques semblent avoir été provoquées par la direction vers laquelle une grande partie du courant dominant en économie a évolué durant ces dernières années. D'un autre côté cependant, certains développements au sein de l'économie contemporaine - des développements essentiellement dus à la renaissance du paradigme autrichien - offrent une compréhension nouvelle de la manière dont l'hypothèse de rationalité est capable de résister à ces critiques anciennes/nouvelles - si on comprend correctement le rôle joué par cette hypothèse en théorie économique. (shrink)