In a market with a few dominant firms and sometimes differentiated products, which structure best fits?

In a market with a few dominant firms and sometimes differentiated products, which structure best fits?

• A. Oligopoly
• B. Monopoly
• C. Perfect Competition
• D. Monopolistic Competition

Answer: (A)

Interdependence among a small number of firms defines this market structure. When only a few players hold a large share of the market and products may be differentiated, each firm must anticipate rivals’ reactions to price and output choices. That strategic interaction—where one firm’s move affects the others and they respond—drives the typical behavior of an oligopoly: concentrated market power, potential for non-price competition, and barriers to entry that keep the field limited. This stands in contrast to a monopoly (one firm controls the market), perfect competition (many firms, price-taking, identical goods), and monopolistic competition (many firms with differentiated products but relatively easy entry and limited market power). So the described market fits an oligopoly.

Interdependence among a small number of firms defines this market structure. When only a few players hold a large share of the market and products may be differentiated, each firm must anticipate rivals’ reactions to price and output choices. That strategic interaction—where one firm’s move affects the others and they respond—drives the typical behavior of an oligopoly: concentrated market power, potential for non-price competition, and barriers to entry that keep the field limited. This stands in contrast to a monopoly (one firm controls the market), perfect competition (many firms, price-taking, identical goods), and monopolistic competition (many firms with differentiated products but relatively easy entry and limited market power). So the described market fits an oligopoly.