Piero Sraffa sees that Marshall, to legitimize the activity of the law of expanding returns without it colliding with the theory of free rivalry, would in general feature the benefits of outside economies connected to an expansion in the development of a whole area of action. In any case, "those economies which are outside according to the perspective of the singular firm, however inward as respects the business in its total, comprise definitively the class which is most sometimes to be met with." "Regardless - Sraffa notes - to the extent that outer economies of the sort being referred to exist, they are not connected to be called forward by little expansions underway," as expected by the marginalist hypothesis of price.[33] Sraffa brings up that, in the harmony hypothesis of the singular ventures, the presence of outer economies can't assume a significant part since this hypothesis depends on minor changes in the amounts created