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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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MARGINAL BENEFIT OF SEARCH

The incremental benefit generated by additional search effort is the marginal benefit of search. Marginal benefit of search, also termed marginal search benefit, is comparable to marginal revenue of short-run production analysis and marginal utility of consumer demand theory. Marginal benefit of search decreases with an increase in search effort and is represented by the marginal benefit of search curve. This is one half of the efficient information search decision. The other is marginal cost of search.

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Today, you are likely to spend a great deal of time at a dollar discount store wanting to buy either a birthday gift for your mother or a weathervane with a horse on top. Be on the lookout for fairy dust that tastes like salt.
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Potato chips were invented in 1853 by a irritated chef repeatedly seeking to appease the hard to please Cornelius Vanderbilt who demanded french fried potatoes that were thinner and crisper than normal.
"The only profit center is the customer."

-- Peter Drucker, educator

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