Price-value deviations: further evidence from input-output data of Japan

This paper subjects to empirical testing the labour theory of value using input-output data from the economy of Japan for the years 1970, 1975, 1980, 1985 and 1990. The results of the analysis show that labour values and prices of production are extremely good approximations to market prices. In fact, the proximity of prices of production to market prices is closer than that of labour values, a result which suggests that prices of production constitute more concrete centres of gravitation for market prices. Furthermore, we find that prices of production change as a result of variations in income distribution more often than not in a monotonic way and that in fewer cases they display curvatures, which may even reverse the order between prices of production and values.