Forms of Market: Perfect Competition, Monopoly, Monopolistic Competition & Oligopoly
Explore the economic mechanism of markets. Understand how number of firms, product differentiation, entry/exit barriers, and pricing power classify market structures into Perfect Competition, Monopoly, Monopolistic Competition, and Oligopoly (Collusive vs. Non-collusive).
1. Meaning & Basis of Market Forms
In economics, a Market does not refer to a specific geographical place. Rather, it is a mechanism through which buyers and sellers come into contact with each other to buy or sell goods/services at mutually agreed prices. Modern markets exist both physically and virtually (online e-commerce).
5 Salient Features of an Economic Market:
Three Primary Determinants of Market Classification:
Determines individual price control. Many sellers = negligible control; One single seller = complete price control.
Free entry yields long-run normal profit. Strong barriers protect supernormal profits for existing sellers.
Uniqueness of commodity. Homogeneous goods force uniform price; differentiated goods allow pricing autonomy.
2. Perfect Competition
Perfect Competition is a market structure with a very large number of buyers and sellers transacting homogeneous (identical) goods at a uniform price set strictly by industry demand and supply.
Individual seller contribution is a miniscule fraction of market supply; cannot alter market price.
Goods are identical in quality, size, packing. Buyers have no preference for any specific seller.
Industry determines price ($P$). Individual firm accepts industry price and sells any output at $P$.
Firms freely enter or exit without legal/monetary barriers, ensuring long-run normal profits only.
Key Analytical Features:
- Perfect Knowledge & Mobility: Buyers/sellers know all market prices. Factors/goods move without transport costs.
- Zero Selling Costs: No expenditure on advertising required since goods are homogeneous and knowledge is complete.
- Horizontal Demand Curve: The individual firm faces a horizontal, perfectly elastic demand curve ($AR = MR = P$).
3. Monopoly
Monopoly (derived from 'Mono' = Single, 'Poly' = Seller) is a market structure with a single seller producing a commodity with no close substitutes and strong barriers to entry. Example: Indian Railways.
No distinction between firm and industry. Monopolist exercises full control over market supply.
Strict legal, financial, or technical barriers prevent rival entry, securing long-run supernormal profit.
Charging different prices for the same product to different buyers or market segments.
The demand curve facing a monopolist is downward sloping and inelastic. The monopolist can sell more quantity only by lowering price ($P$).
4. Monopolistic Competition
Monopolistic Competition is an amalgam of monopoly and perfect competition featuring a large number of sellers offering differentiated but close substitute products. Examples: Toothpaste market, Restaurants.
The cornerstone feature. Differentiation in brand, taste, packaging, or perception grants partial pricing power.
Heavy expenditure on advertising and sales promotion to persuade consumers and build brand loyalty.
Firms compete through free gifts, promotional offers, and quality warranties without changing price.
Downward sloping demand curve that is more elastic (flatter) than monopoly due to close substitutes.
5. Oligopoly (Competition Among the Few)
Oligopoly ("Competition among the Few" - W.H. Fellner) exists when a small number of large firms dominate the market selling homogeneous or differentiated goods. Examples: Automobile manufacturers, Mobile telecom providers, Airlines.
Action by one firm (e.g., Pepsi price drop) triggers direct reaction by rival (Coke), creating pricing uncertainty.
Demand curve cannot be drawn determinately because rival counter-strategies cannot be predicted with certainty.
Prices remain rigid/sticky to avoid destructive price wars and sales uncertainty.
Firms secretly co-operate, collude, and formulate common pricing/output policies to function like a joint monopoly. Example: OPEC (Organization of Petroleum Exporting Countries).
Firms work independently and engage in fierce competition, driving profit levels down toward normal profits in the long run.