[en]In order to extend the theory of value and the trade-off property to economic systems with lands, Ricardo reduced their study to that of productive systems without lands by considering the marginal agricultural methods. Sraffa generalised the analysis to prices of production and rejected the notion of order of cultivation. The strategy works sometimes for extensive cultivation, fails in most cases of intensive cultivation, and always when the net product of agriculture is increased by making use of corn saving methods in industry.[/en]
Unité mixte de recherche 7235
