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July 31, 2026 

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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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FREE GOOD

A good that provides satisfaction of wants and needs without imposing an opportunity cost on society by preventing the production or consumption of other consumer-satisfying goods or services. Production using free goods is generally undertaken using free resources.

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Today, you are likely to spend a great deal of time wandering around the downtown area wanting to buy either a coffee cup commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki or a rechargeable battery for your cell phone. Be on the lookout for crowded shopping malls.
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In his older years, Andrew Carnegie seldom carried money because he was offended by its sight and touch.
"Difficulties mastered are opportunities won. "

-- Winston Churchill, Statesman

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