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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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PERFECT COMPETITION, LONG-RUN EQUILIBRIUM CONDITIONS The long-run equilibrium of a perfectly competitive industry generates six specific equilibrium conditions, including: (1) economic efficiency (P = MC), (2) profit maximization (MR = MC), (3) perfect competition (MR = AR = P), (4) breakeven output (P = AR = ATC), (5) minimum production cost (MC = ATC), and (6) minimum efficient scale (MC = ATC = LRAC = LRMC).
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BEIGE MUNDORTLE [What's This?]
Today, you are likely to spend a great deal of time at a going out of business sale seeking to buy either a small, foam rubber football or an instructional DVD on learning to the play the oboe. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity. Your Complete Scope
This isn't me! What am I?
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It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
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"The truth of the matter is that you always know the right thing to do. The hard part is doing it." -- Norman Schwarzkopf, US Army general
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QJE Quarterly Journal of Economics
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