From: Alejandro Valle Baeza (valle@SERVIDOR.UNAM.MX)
Date: Tue Sep 21 2004 - 01:45:36 EDT
HILBERT SPACE MODELS COMMODITY EXCHANGES by Paul Cockshott is very interesting, especially for me because value-price correspondence is one of my research fields. Since Shaikh published "The transformation from Marx to Sraffa" (1984) there are several articles discussing value-price closeness. Shaikh used correlation coefficients to support the idea that market prices are close to labor values. Petrovich (1987) criticized such measure because spurious correlation and proposed mean absolute deviation for measuring price value deviations. And recently Steedman (1998) proposed to measure such deviations by the angle between market price and value vectors, as pointed out by Cockshott. Nobody uses Euclidian distance to measure value-price deviation. Nevertheless is not clear to me if according to Paul's paper are all of them wrong? Could Paul explain practical implications of his paper for measuring labor value-price deviations? On the other hand, Paul showed that commodity space is not Euclidian could Paul explain why is a Hilbert space? All references are in Paul Cockshott's paper. In solidarity Alejandro Valle Baeza
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