During the last fifteen years certain very fundamental aspects of economic theory have been very actively debated. The debate has often been called the Cambridge controversy, since the main parti cipants in the debate come from Cambridge, USA and Cambridge, Eng land. In this debate certain important foundations of economic theory have been criticized which are specifically important for understand ing price formation and income distribution. An important starting point has been Sraffa's extensions of Ricardo's theory and one has therefore sometimes called those neo-Ricardians, who have based...