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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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ARC ELASTICITY The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.
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An Altogether Look at UNIONSHey, look! Is that who I think it is? Yes of course, that's Dan Dreiling the drywall guy. You might recall that Dan repaired a hole in my living room wall back in Fact 7. He's coming out of the Mona Mallard Duct Tape Industries plant with all of the duct tape factory workers. And he seems most distressed. Let's get to the bottom of this. Here's his story. The drywall business sort of dried up, and Dan has taken up employment in the exciting field of duct tape fabrication. The duct tape workers, though, are talking union. Dan's indecisive about this move toward unionization. Perhaps we can help him out. Let's stroll around the often controversial topic of labor unions.
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WHITE GULLIBON
[What's This?]
Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club seeking to buy either a brown leather attache case or car battery jumper cables. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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This isn't me! What am I?
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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.
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"The greatest barrier to success is the fear of failure." -- Sven Goran Eriksson, writer
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PHLX
Philiadelphia Stock Exchange
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