Value and exploitation: a comment

This paper comments on a recent paper by Ernesto Screpanti (2003), in this journal, on Marxian theories of value and exploitation. The paper argues, in opposition to Screpanti, that the labour theory of value is the most suitable foundation for a realistic and historically determined vision of society; that labour values provide a unique coherent conceptual framework for understanding the nature of profit; that the inconsistency of labour values is only apparent, as it disappears with a judicious choice of numeraire; and that prices of production explain much less than labour values and are therefore an inadequate substitute for the latter.