Abstract

Like Mises before him, Hayek challenges the validity of socialism as a centrally planned economic regime typically characterized by state ownership of all means of production. What is typical of Hayek's challenge is that he holds that this question is fully theoretical in nature and that it has consequently to be raised and decided as a scientific question. Sketching the historical background of the socialist calculation debate of the 1920s and 1930s, I first show how this debate is linked with the Menger-Wieser Zurechnungsproblem, which indeed constitutes the very topic of Hayek’s 1923 Ph. D. dissertation. I recall that the Pareto-Barone approach based on General Equilibrium Theory (GET) has determined the conceptual framework of this controversy. I then go on to explore Hayek's impracticability argument against market socialism and try to show how it is related to, but different from, Mises’s logical impossibility argument. I argue that the contexts of discussion were completely different in both cases: if Mises was criticizing the possibility of rational economic decisions in a moneyless economy, Hayek was debating against the Lange-Dickinson-Lerner model of market socialism where the prices of first order goods were supposedly fixed following a GET simulation of the competetive market process. The core of Hayek’s line of reasoning is shown to be related to a clever analysis of the notion of ‘data’: the data on which a Central Planification Board is suppose to work out a production and distribution schema for the whole economy are simply unavailable to him because this kind of economic knowledge (which Michael Polanyi calls “tacit knowledge”) cannot be accumulated and stored up anywhere in society, as if the global economy could be directed by a super-brain possessing complete knowledge of every particular situation and able to compute a perfect solution to any economic problem whatsoever..