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September 30, 2020 

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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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EXCESS SUPPLY:

A disequilibrium condition in a competitive market in which the quantity supplied is greater than the quantity demanded. Excess supply is another way to say surplus. It also goes by the common term of buyers' market. Excess supply is one of two disequilibrium states of the market. The other is excess demand (or shortage).
Excess supply emerges in a market when the quantity supplied by the sellers exceeds the quantity demanded by the buyers... at a given market price. Sellers are seeking to sell more of the good than buyers are willing to buy, hence there is an "extra" or "excess" amount of supply.

Excess Supply
Excess supply is illustrated using the market for 8-track tapes displayed in this exhibit. This graph was generated with data from the 88th Annual Trackmania 8-Track Tape Collectors Convention at the Shady Valley Exposition Center.

The excess supply for 8-track tapes is indicated as the difference between the quantity supplied and the quantity demanded at a specific market price. In particular, at a 70-cent price, the quantity supplied is 600 tapes and the quantity demanded is 200 tapes. Sellers are willing and able to sell 400 tapes more than buyers are willing and able to buy. Hence this market has an excess supply of 400 tapes.

The result of this excess supply is a decrease in the market price. Because sellers are unable to sell as much of the good as they want, they are inclined to bid down the price. Of course, as the price falls, the quantity demanded increases and the quantity supplied decreases, both acting to reduce the amount of the excess supply. Ultimately the entire excess supply is eliminated and equilibrium is restored.

<= EXCESS RESERVESEXCHANGE =>


Recommended Citation:

EXCESS SUPPLY, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2020. [Accessed: September 30, 2020].


Check Out These Related Terms...

     | surplus | buyers' market | excess demand | shortage | sellers' market | market disequilibrium | disequilibrium price |


Or For A Little Background...

     | market | equilibrium | market equilibrium | equilibrium price | equilibrium quantity | law of supply | law of demand | market clearing | voluntary exchange |


And For Further Study...

     | market equilibrium, numerical analysis | market equilibrium, graphical analysis | competitive market | self correction, market | competitive market | invisible hand | free enterprise |


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