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INCOME EFFECT: One of two reasons for the law of demand and the negative slope of the market demand curve (the other is the substitution effect). The income effect results because a change in price gives buyers more real income, or the purchasing power of the income, even though money or nominal income remains the same. This causes changes in the quantity demanded of the good.

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FREE-RIDER PROBLEM: The inclination to enjoy the benefit of a good without paying for it--if you don't have to. This is the main reason public goods are produced by government. Most people won't voluntarily pay for a public good, because excludability means they can get it without paying--a free ride. With a large number of free riders--perhaps everyone--voluntary payments like those occurring in markets won't provide enough revenue to pay production costs. The only way to finance public goods is to force free-riders, and everyone else, to pay through taxes.

     See also | public good | excludability | rival consumption | good types | market | taxes | production cost |


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FREE-RIDER PROBLEM, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: June 7, 2026].


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INFLATIONARY EXPECTATIONS, AGGREGATE DEMAND DETERMINANT

One of several specific aggregate demand determinants assumed constant when the aggregate demand curve is constructed, and that shifts the aggregate demand curve when it changes. An increase in the inflationary expectations causes an increase (rightward shift) of the aggregate curve. A decrease in the inflationary expectations causes a decrease (leftward shift) of the aggregate curve. Other notable aggregate demand determinants include interest rates, federal deficit, and the money supply.

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