In many cases, there can be the entry of an alike product but the title of the product and the packaging styles would have set the original product a way long higher than the reach of new comers.
Ammunition suppliers and nuclear dealers are examples of monopoly in every country. ‘Microsoft’ is the largest name in monopoly of computer science and services. Italian and Indian governments have their monopoly in tobacco products. Mostly all the narcotic drug deals are associated with certain government monopolies. Railways of India and Russia and many high-end road tracks are now monopolies of concerned governments. In all these cases, one perfect seller is found to have the authority to occupy and decide on the sales of the product. Thus it seals the possibility of any competitive entry.
Oligopoly is an inter-related marketing system maintained by a group of sellers of the same product or service (ibid: 178). Oligopoly frames a formal agreement among the members of the group in order to regulate the decisions regarding production and supply of product under trade in such way that each member is equally benefited from the market share. This system facilitates clear awareness of each member about what is going around with other members. The strategies and decisions are commonly taken for profit maximization conditions. The oligopoly is formed by high end sellers of the same product; therefore their union restricts the entry of infant sellers in the market. Interdependence, product differentiation and perfect knowledge are added advantages of an oligopoly.
Almost all the large enterprises operating for product sales and consumer services are associates of oligopolies. Petroleum products, airlines and telecommunication services are examples of oligopolies. Verizon, AT&T Sprint Nextel, and T-Mobile are cellular giants of American oligopoly. While OPEC is the largest holder of petroleum products,