Supply and demand constantly determine the prices of commodities; never balance, or only coincidentally; but the cost of production, for its part, determines the oscillations of supply and demand.
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Notebook I, The Chapter on Money, p. 58Karl Marx
The opinions that the price of commodities depends solely on the proportion of supply and demand, or demand to supply, has become almost an axiom in political economy, and has been the source of much error in that science.
David Ricardo
...the power to control the supply of money, which is one of the fundamental aspects of sovereignty, has passed from government into other hands; and therefore new institutions must be set up which will in effect exercise some of the major functions of government. They would set the level of public expenditure, and settle fiscal policy, the exercise of taxing and borrowing powers of the state, since these are indisputedly the mechanism by which the money supply is determined. But they would do more than this. They would be supreme over the economic ends and the social structure of society: for by fixing prices and incomes they would have to replace the entire automatic system of the market and supply and demand—be that good or evil—and put in its place a series of value judgments, economic or social, which they themselves would have to make...There is a specific term for this sort of polity. It is, of course, totalitarian, because it must deliberately and consciously determine the totality of the actions and activities of the members of the community; but it is a particular kind of totalitarian regime, one, namely, in which authority is exercised and the decisions are taken by a hierarchy of unions or corporations—to which, indeed, on this theory the effective power has already passed. For this particular kind of totalitarianism the Twentieth Century has a name. That name is "fascist".
Enoch Powell
There is a supply for every demand.
Florence Scovel Shinn
As scarce as truth is, the supply has always been in excess of the demand.
Josh Billings
Even if the constants which economists wish to determine were less numerous, and the method of experiment more accessible, we should still be faced with the fact that the constants themselves are different at different times. The gravitation constant is the same always. But the economic constants — these elasticities of demand and supply — depending, as they do, upon human consciousness, are liable to vary. The constitution of the atom, as it were, and not merely its position, changes under the influence of environment.
Arthur Cecil Pigou
Marx, Karl
Mary (mother of Jesus)
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