About the competition of market a good example came in light in 1984. It was Upjoh’s patent on ibuprofen-a painkiller that the company still markets under the brand name Motrin-expired. It got the good popularity soon. The most people who use ibuprofen, like most people who use aspirin, now purchase a generic version made by one of many producers.
The shift to perfect competition, not coincidentally, is accompanied by a sharp fall in the market price. When its patent expired, Upjohn immediately cut the price of Motrin by 35 percent, but as more companies started selling the generic drug, the price of ibuprofen eventually fell by another two-thirds.
Ten years later the patent on the painkiller naproxen-sold under the brand name Naprosyn-expired. The generic version of naproxen was soon selling at only one-tenth of the original of naprosyn.
It was Paul Krugman and Robin Wells who wrote about this competition in Perfect Competition of Micro Economics.
On the other hand, there is monopoly. It happens when one seller constitutes the whole industry, market comes under the monopoly. Monopoly exists when there is a single seller or producer.
There are some features and example of Monopoly –
Single seller or producer:
Mono is known as one. Poly is used for one seller.
No close substitutes
Barrier for entry of firm
Demand curve monopoly shows, a monopoly seller are the sole producer in the industry; it has total control over the price and production. So, the demand curve will be downwards slopping. It can increase the price if it is ready to sacrifice the demand a title and can decrease the price if it wants the sales to increase.
Competition ends under monopoly. It is the highest position of competition where all firms convert into single firm. Under the monopoly of market buyers are depended on sellers. There is no meaning of demand under monopoly.
