In economics, a margin is a set of constraints conceptualised as a border. 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.
- Wicksteed, Philip Henry; The Common Sense of Political Economy (1910),] Bk I Ch 2 and elsewhere.
Original source: https://en.wikipedia.org/wiki/ Margin (economics). Read more