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This article concerns a concept of economic theory. For discussion of the term “margin” as used in the jargon of bourses, see “Margin (finance)”.

In economics, a margin is a set of constraints conceptualised as a border.<ref name="wicksteed">Wicksteed, Philip Henry; The Common Sense of Political Economy (1910), Bk I Ch 2 and elsewhere.</ref> A marginal change is the change associated with a relaxation or tightening of constraints — either change of the constraints, or a change in response to this change of the constraints.<ref name="wicksteed" />


Margin (economics) sections
Intro   Extensive and intensive margins    See also    References   

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