Economics · Ch 5 — Market Structure and Pricing
Meaning and Classification of Market Structures
Meaning and Classification of Market Structures
In economics, a market is not a single physical place but any arrangement that brings buyers and sellers of a commodity into contact so that a price for it can be determined. The market structure for a good refers to the organisational features that determine the nature of competition and price formation in that market — chiefly the number of firms selling the product, the extent to which their products are identical or differentiated, the ease with which new firms can enter or existing firms can exit, and the degree of control an individual seller has over the price.
Based on these criteria, economists classify markets into four broad structures, arranged along a spectrum from the most competitive to the least:
Perfect competition — a very large number of small sellers, each selling an identical (homogeneous) product, with completely free entry and exit, and perfect knowledge of prices; no single seller can influence the price, so every firm is a "price taker."
Monopoly — a single seller controls the entire market supply of a product that has no close substitute, and entry of new firms is completely blocked; the monopolist is a "price maker" with substantial (though not unlimited) control over price.
Monopolistic competition — a large number of sellers, each selling a slightly differentiated version of a broadly similar product (branding, packaging, quality, location), with relatively free entry and exit; each seller has some, but limited, control over the price of its own variant.
Oligopoly — a small number of large sellers dominate the market, so that each firm's price and output decisions visibly affect, and are affected by, the decisions of its rivals (mutual interdependence); entry is difficult but not impossible.
| Feature | Perfect Competition | Monopoly | Monopolistic Competition | Oligopoly |
|---|---|---|---|---|
| Number of sellers | Very large | One | Large | Few |
| Nature of product | Homogeneous | Unique, no substitute | Differentiated | Homogeneous or differentiated |
| Entry/Exit | Completely free | Fully blocked | Relatively free | Difficult |
| Control over price | None (price taker) | Considerable (price maker) | Limited | Interdependent |
This state's own syllabus classifies markets using the same criteria — number of sellers, nature of the product, and entry conditions — that are standard across Indian economics teaching, since these describe universal features of how any real market actually functions, not a state-specific convention.
The organisational features of a market — number of sellers, nature of the product, entry/exit conditions, and control over price — that determine the nature of competition and price formation in it.
A firm with no ability to influence the market price by its own action, and which must accept the price set by overall market demand and supply — the position of every firm under perfect competition.