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AGGREGATE MARKET EQUILIBRIUM: The state of equilibrium that exists in the aggregate market when real aggregate expenditures are equal to real production with no imbalances to induce changes in the price level or real production. In other words, the opposing forces of aggregate demand (the buyers) and aggregate supply (the sellers) exactly offset each other. The four macroeconomic sector (household, business, government, and foreign) buyers purchase all of the real production that they seek at the existing price level and business-sector producers sell all of the real production that they have at the existing price level. The aggregate market equilibrium actually comes in two forms: (1) long-run equilibrium, in which all three aggregated markets (product, financial, and resource) are in equilibrium and (2) short-run equilibrium, in which the product and financial markets are in equilibrium, but the resource markets are not.

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FOURTH RULE OF COMPETITION: The fourth of seven basic rules of the economy. It is the notion that competition among market buyers and sellers generate an efficient allocation of resources. Competition depends on the relative number of buyers and sellers. Fewer numbers give that side of the market relatively more market control and thus limits competition.

     See also | seven rules | market | competition | resource allocation | market control | monopoly | perfect competition | efficiency | competition among the many | competition among the few |


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MEDIAN VOTER PRINCIPLE

A public choice principle stating that the median voter, the voter with an equal number of votes on either side, determines the outcome of an election by determining which side receives the majority. The preferences of this median vote, thus become the most important preferences addressed by candidates running for election. However, the median voter's preferences might not generate was is best, that is, efficient, for society. Other related voting problems identified by the study of public choice includes the voting paradox, logrolling, and voter apathy (due to rational ignorance and rational abstention).

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Today, you are likely to spend a great deal of time strolling through a department store seeking to buy either a tall storage cabinet with five shelves and a secure lock or a birthday greeting card for your grandmother. Be on the lookout for deranged pelicans.
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