Which market structure typically features many sellers offering differentiated products and some price control?

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

Answer: (D)

This item is testing your understanding of market structures where many sellers offer products that are not identical, giving each firm some ability to influence its own price. In monopolistic competition, there are many firms, each selling a product that has distinct features, branding, or quality—so consumers see differences and aren’t perfect substitutes. Because of this product differentiation, each firm faces its own downward-sloping demand and can set a price above marginal cost to some extent. However, entry is relatively easy, so profits tend to move toward zero in the long run, keeping price control moderate rather than absolute.

If there were only a single seller, you’d be in monopoly territory with substantial price control. If there were only a few sellers, that would be oligopoly, where price and output depend on inter-firm strategic behavior. And if products were identical and there were many sellers, prices would be driven by the market with little room for individual pricing, as in perfect competition.

So, many sellers with differentiated products and some price control are the hallmark of monopolistic competition.