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HORIZONTAL ADDITION: In graphical analysis, the technique of combining two curves by adding the value of the variable on the horizontal or X axis for a given value of the variable on the vertical or Y axis. This is commonly done when deriving a market demand curve from a set of individual demand curves. The quantity demanded by every individual is added at a given price to identify the total market demand at that price.

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COMPLEMENT: Two goods that "go together," either in consumption or production. In terms of demand, a complement-in-consumption is one of two goods that are consumed together such that an increase in the price of one good leads to a decrease in demand and a leftward shift in the demand curve for the other good. If the demand of good 1 decreases as the price of good 2 increases, the goods are complements-in-consumption. In terms of supply, a complement-in-production is one of two goods that are produced jointly using the same resources, such that an increase in the price of one good leads to an increase in supply and a rightward shift in the supply curve for the other good. If the supply of good 1 increases as the price of good 2 increases, the goods are complements-in-production.

     See also | demand | complement-in-consumption | supply | complement-in-production | demand curve | supply curve | consumption | production | demand shock | supply shock | demand determinants | supply determinants |


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PRICE RATIONING

The distribution or allocation of a limited commodity using markets and prices. Rationing is needed due to the scarcity problem. Because wants and needs are unlimited, but resources are limited, available commodities must be rationed out to competing uses. Markets ration commodities by limiting the purchase only to those buyers willing and able to pay the price.

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers wanting to buy either a large, stuffed kitty cat or a cross-cut paper shredder. Be on the lookout for deranged pelicans.
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