Front Page Titles (by Subject) EFFECTUAL DEMAND, IN REGARD TO ITS EXTENT. - Definitions in Political Economy
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EFFECTUAL DEMAND, IN REGARD TO ITS EXTENT. - Thomas Robert Malthus, Definitions in Political Economy 
Definitions in Political Economy (London: John Murray, 1827).
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EFFECTUAL DEMAND, IN REGARD TO ITS EXTENT.
50. The quantity of a commodity wanted by those who are able and willing to pay the costs of its production.