5 Oligopoly 5.1 Markets differ according to what three dimensions in terms of market structure? 5.2 What is a real-life example of an oligopoly and why? 5.3 What are the three models of oligopoly? 5.4 Would a firm prefer to be in a market with an oligopoly, a monopoly, or perfect competition? Why? 5.5 Would a consumer prefer to be in a market with an oligopoly, a monopoly, or perfect competition? Why? 5