Final answer:
In imperfect competition, two types of market structures are monopolistic competition, with many firms selling similar products, and oligopoly, where a few large firms dominate the market.
Step-by-step explanation:
Two types of market structures that qualify as imperfect competition are monopolistic competition and oligopoly.
Monopolistic Competition
Monopolistic competition describes a market with a large number of firms that sell similar but not identical products. An example is the retail clothing industry, where many stores sell different styles and brands of clothing, creating a competitive environment where no single firm dominates the market.
Oligopoly
An oligopoly exists when a market is dominated by a few large firms. High barriers to entry often protect the firms within an oligopoly. Industries like commercial aircraft manufacturing and soft drinks, where brands like Boeing, Airbus, Coca-Cola, and Pepsi dominate, are examples of oligopolistic markets.