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 an article in a market would occasion a greater demand for it compared with the supply, and raise its price, although in this case less than usual of the article must be purchased by the consumers. Demand in this sense is obviously quite different from the sense in which Mr. Ricardo had before used the term. The one is a demand in regard to extent, the increase of which implies a greater quantity of the commodity purchased; the other is demand in regard to intensity, the increase of which implies the will and power to make a greater sacrifice in order to obtain the object wanted. It is in this latter sense, I think, that the term is most frequently applied; at any rate, it is in this latter sense alone that demand raises prices.* It is in the nature of things absolutely impossible that any demand, in regard to extent, should raise prices, unaccompanied by a will and power on the part of the demanders to make a greater sacrifice, in order to satisfy their wants. And my object is to shew that, whenever we talk of demand and supply as determining prices, whether market, or natural, the terms must always be understood in the sense in which Mr. Ricardo, and every other person, has hitherto understood them, when speaking of commodities bought and sold in a market.

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