How Say's Law May Encounter Difficulties

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"The fact that there exists a potential barter bargain of goods for labor services that would be mutually agreeable to producers as a group and labor as a group is irrelevant to the motion of the system. The individual steel producer cannot pay a newly hired worker by handing over to him his physical product (nor will the worker try to feed his family on a ton-and-a-half of cold-rolled sheet a week)." -- Axel Leijonhufvud, Keynesian Economics and the Economics of Keynes, p. 90

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