Marx as an a-Ricardian: value,money and price at the beginning of Capital

The fundamental distinction between Ricardo and Marx is once more examined, chiefly with reference to the current spread, among some leftwing economists, of a neo-Ricardian school. So a crucial point seems to be the particular meaning, which is quite a-Ricardian, of the first section of the Capital. Anyhow, this section is often misunderstood, because of its difficulty, and its philosophical form.