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OLIGOPOLY, CONCENTRATION: Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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ALLOCATION EFFECT

A change in the allocation of resources caused by placing taxes on economic activity. By creating disincentives to produce, consume, or exchange, taxes generally alter resource allocations. The allocation effect is typically used when governments seek to discourage the production, consumption, or exchange of particular goods or activities that are deemed undesirable (such as tobacco use or pollution). This is one of two effects of taxation. The other (primary) is the revenue effect, which is the generation of revenue used to finance government operations.

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Today, you are likely to spend a great deal of time watching infomercials seeking to buy either a set of steel-belted radial snow tires or a wall poster commemorating the 2000 Presidential election. Be on the lookout for gnomes hiding in cypress trees.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"If you are going to achieve excellence in big things, you develop the habit in little matters. Excellence is not an exception, it is a prevailing attitude. "

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