• Perfect competition is a market situation where a large number of sellers and large numbers of buyers buy and sell homogenous goods that are identical.
  • In perfect competition seller is a price taker, sellers accept the price determined by the market demand and supply.
  • There is no restriction for any person to produce and sell the existing commodity. Agricultural markets are commonly used as an example.


  1. Large number of buyers and sellers: In perfect competition, there is a large number of buyers and sellers. The existence of a large number of buyers and sellers makes no influence on the price of the product. Therefore, the individual firm under perfect competition is a price taker because it does not influence the price. Firms have to accept prices determined by market demand and supply.
  2. Homogeneous or Similar products: It means that the product or commodity that is sold in perfect competition is similar or identical. when goods are homogenous there is no possibility of charging a higher price by any seller.
  3. Free entry and exit of the firm: There is no restriction for the entry and exit of the firm in the perfect competition market. Any producer to produce a commodity and sell it in the market freely.
  4. Complete market information: In perfect competition buyers and sellers have perfect knowledge or complete information about the market price, demand, supply, etc. A complete market knowledge helps the buyers to pay higher prices.
  5. Perfect mobility of factors of production: Under perfect competition, the factors of production are assumed to be freely mobile. Factors of production such as labour and capital are assumed to be mobile. The mobility of factors helps the firm to adjust the market demand with the change in market supply.
  6. No transportation cost: It is assumed that there is no transportation cost under perfect competition. It applies when the production area and sales market take place in a small geographical area or the same area. For example, agricultural products are sold in the same village or town which requires no transportation cost.


  1. Short run is the conceptual period where at least one factor of production is fixed in amount while other factors are variable
  2. The short-run is a period within which the firms can change their level of output only by increasing or decreasing the variable factors such as labour and raw material, while fixed factors like capital equipment, machinery, etc. remain unchanged or constant.
  3. A firm in the short run is in equilibrium at a point where Marginal Revenue (MR) is equal to Marginal Cost (MC) i.e. MR=MC and where MC is cutting MR from below
  4. The firm under perfect competition operates under the U – shaped cost curve. Since marginal revenue is the same as price or average revenue under perfect competition, the firm will equalize marginal cost with a price to attain the equilibrium level of output.
  5. A firm under perfect competition in the short run being in equilibrium does not necessarily earn profit. The firm determines the equilibrium level of output and price and tries to earn an excess profit, normal profit, or may even incur a loss.

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