On the Role of Demand in Ricardo and Marshall

The present note is a development of a paper I presented some four years ago at the 1987 meeting of the History of Economics Society (Caravale 1987), and that was later published in Rivista di Politico Economica in an expanded version (Caravale 1988). The aim of these two writings was to emphasize that—contrary to what is often maintained—demand conditions play a fundamental role in classical and classical-type theories. This role is different from that played by demand in neoclassical theories (where equilibrium prices are determined by demand and supply functions), and is so to speak “internal” to the theory of natural equilibrium since it is connected with the definition, for each situation, of the Smithian “point of effectual demand.” Before turning to the specific object of this note, let me recall very briefly the main points of the general thesis developed in the above-mentioned papers.