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Indeed, if everyone is price taker, there is the need for a benevolent planner who gives and sets the prices, in other word, there is a need for a "price maker". Therefore, it makes the perfect competition model appropriate not to describe a decentralized "market" economy but a centralized one.
Perfect competition refers to a type of market where there are many buyers and sellers that feature free barriers to entry, dealing with homogeneous products with no differentiation, where the price is fixed by the market. Individual firms are price takers [3] as the price is set by the industry as a whole. Example: Agricultural products which ...
Without barriers to entry and collusion in a market, the existence of a monopoly and monopoly profit cannot persist in the long run. [1] [3] Normally, when economic profit exists within an industry, economic agents form new firms in the industry to obtain at least a portion of the existing economic profit.
As all firms in the market are price takers, they essentially hold zero market power and must accept the price given by the market. A perfectly competitive market is logically impossible to achieve in a real world scenario as it embodies contradiction in itself and therefore is considered an idealised framework by economists. [14]
Market power is a company's ability to increase prices without losing all its customers. Any company that has market power can engage in price discrimination. Perfect competition is the only market form in which price discrimination would be impossible (a perfectly competitive company has a perfectly elastic demand curve and has no market power).
If the industry is perfectly competitive (as is assumed in the diagram), the firm faces a demand curve that is identical to its marginal revenue curve (), and this is a horizontal line at a price determined by industry supply and demand.
In microeconomics, it applies to price and output determination for a market with perfect competition, which includes the condition of no buyers or sellers large enough to have price-setting power. For a given market of a commodity , demand is the relation of the quantity that all buyers would be prepared to purchase at each unit price of the good.
The first states that in economic equilibrium, a set of complete markets, with complete information, and in perfect competition, will be Pareto optimal (in the sense that no further exchange would make one person better off without making another worse off). The requirements for perfect competition are these: [1]