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The term "market", as used by economists, is an extension of the ancient idea of a market as a place where people gather to buy and sell goods. In former days part of a town was kept asthe market or marketplace, and people would travel many kilometres on special market-days in order to buy and sell various commodities. Today, however, markets such as the world sugar market, the goldmarket and the cotton market do not need to have any fixed geographical location. Such a market is simply a set of conditions permitting buyers and sellers to work together.

In a free market,competition takes place among sellers of the same commodity, and among those who wish to buy that commodity. Such competition influences the price prevailing in the market. Prices inevitably fluctuate, andsuch fluctuations are also affected by current supply and demand.

Whenever people who are willing to sell a commodity contact people who are willing to buy it, a market for that commodity iscreated. Buyers and sellers may meet in person, or they may communicate in some other way: by letter, by telephone or through their agents. In a perfect market, communications are easy, buyers and sellersare numerous and competition is completely free. In a perfect market there can be only one price for any given commodity: the lowest price which sellers will accept and the highest which consumerswill pay. There are, however, no really perfect markets, and each commodity market is subject to special conditions. It can be said however that the price ruling in a market indicates the point wheresupply and demand meet.
Traducción:
El término "mercado", según lo utilizado por los economistas, es una extensión de la antigua idea de un mercado como un lugar donde las personas se reúnen paracomprar y vender mercancías. En días pasados ​​parte de la ciudad se mantuvo como el mercado o la plaza del mercado, y la gente iba a viajar muchos kilómetros en especial los días de mercado para la...