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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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MACROECONOMICS

The branch of economics that studies the entire economy, especially such topics as aggregate production, unemployment, inflation, and business cycles. It can be thought of as the study of the economic forest, as compared to microeconomics, which is study of the economic trees.

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APLS

GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time strolling through a department store wanting to buy either a remote controlled train set or a genuine down-filled snow parka. Be on the lookout for infected paper cuts.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"It is not fair to ask of others what you are unwilling to do yourself. "

-- Eleanor Roosevelt, diplomat, activist

WACM
Weak Axiom of Cost Minimization
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