<div class="text-justify">Market Structure Is a system that regulates/governs market rules that occur in the continuity between the seller and the buyer in a transaction made for a particular purpose, there are several factors that can classify form Market Structure.

In a perfectly competitive market, decisions about the number of output firms individually can not affect the price level, and for decisions on pricing, the demand curve is horizontal, therefore price is considered constant, regardless of output. Thus the total profits will be obtained.

The monopoly market is a form of interaction between demand and supply where there is only one seller/producer dealing with many buyers or consumers. Pure monopoly is a market where there is only one seller. There is no substitution for the goods or services offered by the monopolist. Thus, the monopoly market has absolutely no competition, real or potential. Thus the actions of a monopolist do not affect other companies, such as price changes or the conduct of advertisements, and the actions of other companies also do not affect the monopolist. Pure monopoly, like pure competition, is an extreme market form and does not exist in reality.

Existing industries are near monopolies markets that are mostly served by one company or a seller in a particular location. For example, a doctor who opens a practice in a small town where he is the only doctor in town. Called approaching monopoly because the doctor is not really the only seller (service) and instead of having no rivals at all. In other nearby cities doctors are also available. The only meatball seller in our village, may be categorized as "near-monopoly". Markets approaching monopoly are usually local, but some industries are nationwide. For example, Pepsodent toothpaste is available in a store without any significant rivals and controls a large part of the store's market.</div>