Refers to the structure of an industry or market, as reflected in the number and size distribution of sellers and buyers, the degree of physical or subjective differentiation distinguishing competing sellers' products, the presence or absence of barriers to the entry of new firms, the degree to which firms are vertically integrated from raw material production to retail distribution, the extent of firms' product line diversification, and cost structures. Market structure affects market conduct, which in turn determines market performance characteristics that are the goal of competition policy.

The way that suppliers and demanders in an industry interact to determine price and quantity. There are four main idealized market structures that have been used in trade theory: perfect competition, monopoly, oligopoly, and monopolistic competition.

The degree of competition in a market, ranging from many buyers and sellers to few or even single buyers or sellers.

Four general types of market structure are perfect competition, monopoly, monopolistic competition, and oligopoly. The structure of a market depends on the number of buyers and sellers, as well as the extent of product differentiation and other factors.

The important features of a market such as the number of firms, uniformity across firms, ease of entry, and forms of competition.

The composition of firms in a market, including perfect competition, monopolistic competition, oligopoly, and monopoly

In economics, market structure (also known as market form) describes the state of a market with respect to competition.