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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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NORMATIVE ECONOMICS

The branch of economics that seeks to recommend the way the economy should operate. It is the policy side of economics that is based on individual preferences and cannot be proven either right or wrong. A normative economic statement cannot be refuted by looking at the real world--that is, by testing hypotheses.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time at a going out of business sale hoping to buy either a set of serrated steak knives, with durable plastic handles or a pair of blue silicon oven mitts. Be on the lookout for slow moving vehicles with darkened windows.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"Carpe diem! Rejoice while you are alive; enjoy the day; live life to the fullest; make the most of what you have. It is later than you think."

-- Horace, Ancient Roman poet

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