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OLIGOPOLY: A market structure dominated by a small number of large firms, selling either identical or differentiated products, and significant barriers to entry into the industry. This is one of four basic market structures. The other three are perfect competition, monopoly, and monopolistic competition.

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UNSTABLE EQUILIBRIUM

Equilibrium that is not restored if disrupted by an external force. Few economic models have an equilibrium that is unstable, reflecting the observation that the real world adapts to changes and maintains a fair degree of stability. However, there are situations where an unstable equilibrium more accurately reflects economic phenomena. The alternative to an unstable equilibrium is a stable equilibrium.

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APLS

PURPLE SMARPHIN
[What's This?]

Today, you are likely to spend a great deal of time calling an endless list of 800 numbers looking to buy either clothing for your kitty cats or a set of luggage without wheels. Be on the lookout for pencil sharpeners with an attitude.
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This isn't me! What am I?

The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
"Ships are safe in harbor. But that is not what ships are for."

-- Anonymous

JLEO
Journal of Law, Economics and Organization
A PEDestrian's Guide
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