Abstract

The following article proposes a change of perspective in the capital-theory debate of political economy. Instead of insisting upon the differences between a Marxian labour theory of value and a Ricardo-Sraffaian theory of prices of production (Marx versus Sraffa) the common basis of the two approaches is stressed. The common basis consists in the paradigm of duality between physical quantities and evaluation standards. The last part of the paper collects sceptical arguments concerning the question of whether the duality paradigm can provide an adequate approach to an analysis of modern technical change.