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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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AVERAGE REVENUE AND MARGINAL REVENUE

A mathematical connection between average revenue and marginal revenue stating that the change in the average revenue depends on a comparison between average revenue and marginal revenue. For perfect competition, with no market control, marginal revenue is equal to average revenue, and average revenue does not change. For monopoly and other firms with market control, marginal revenue is less than average revenue, and average revenue falls.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either a pair of leather sandals that won't cause blisters or clothing for your kitty cats. Be on the lookout for attractive cable television service repair people.
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In the early 1900s around 300 automobile companies operated in the United States.
"Inside the ring or out, ain't nothing wrong with going down. It's staying down that's wrong. "

-- Muhammad Ali

DPI
Disposable Personal Income
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