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MARGINAL PROPENSITY TO SAVE: The proportion of each additional dollar of household income that is used for saving. Or alternatively, this is the change in saving due to a change in disposable income. Abbreviated MPS, the marginal propensity to save is the slope of the saving or propensity-to-save line. It also takes center stage for the multiplier effect. In particular, the inverse of the MPS is the simple expenditure multiplier. The sum of the marginal propensity to save and the related concept, the marginal propensity to consume, is equal to one.

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MARGINAL FACTOR COST CURVE

A curve that graphically represents the relation between marginal factor cost incurred by a firm for hiring an input and the quantity of input employed. A profit-maximizing firm hires the quantity of input found at the intersection of the marginal factor cost curve and marginal revenue product curve. The marginal factor cost curve for a firm with no market control is horizontal. The marginal factor cost curve for a firm with market control is positively sloped and lies above the average factor cost curve.

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Today, you are likely to spend a great deal of time at a going out of business sale looking to buy either a half-dozen helium filled balloons or a packet of address labels large enough for addresses of both the sender and the recipient. Be on the lookout for door-to-door salesmen.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
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