A commonly used word for Dilong Qu is monopoly.
Monopoly, also known as seller's monopoly, monopoly, and monopoly, generally refers to the only seller facing competitive consumers in one or more markets through one or more stages. Contrary to the buyer's monopoly, the monopolist can adjust prices and output at will in the market, which can be achieved through exclusive legal privileges, control over supply sources, or joint or collaborative actions among enterprises.
Originally it refers to manipulating trade from the high ground of the market. Later, it generally refers to monopoly and monopoly. China has called monopoly since ancient times. In ancient China, salt, iron, and tea were government-run monopolies for a long time. Due to huge profits, once a crisis occurred, a ban system would inevitably be implemented to supplement the shortage of national supplies.
Franchised Monopoly
Some exclusive business privileges are stipulated and protected by law. Patents and copyrights are monopolies licensed by law. In order to encourage creation and invention, most countries have enacted patent laws. It can be seen that patent monopoly is caused by legal barriers. In some cases, the government grants a manufacturer exclusive rights to operate, and sometimes the government grants exclusive operating privileges through contracts through bidding competitions.
If a certain product requires a large investment in fixed equipment and large-scale production can greatly reduce costs, then a large manufacturer may become the only producer in the industry. When one large manufacturer supplies all market demand, the average cost is the lowest. If two or more manufacturers operate in the market, it will be difficult to make profits. In this case, the manufacturer will form a natural monopoly.