CCEA A Level Economics
CCEA A Level Economics A2 1 Monopolistic Competition and Oligopoly Exam Questions
Free CCEA A Level Economics revision for A2 1 Monopolistic Competition and Oligopoly: what you need to know, common mistakes and exam-style questions with answers. Covers monopolistic competition equilibrium, oligopoly, interdependence, collusion, non-price competition, the kinked demand curve and game theory.
Practise A2 1 Monopolistic Competition and Oligopoly with past papers
Once you have learnt this topic, find the A2 1 Monopolistic Competition and Oligopoly questions in real CCEA A Level Economics past papers and mark them with the mark scheme. Doing lots of real questions is the quickest way to learn how examiners ask about each idea.
About CCEA A Level Economics A2 1 Monopolistic Competition and Oligopoly
These two market structures in Unit A2 1: Business Economics describe most real-world markets. Monopolistic competition has many firms selling differentiated products with low barriers to entry, and you need its short-run and long-run equilibrium, where supernormal profit is competed away. Oligopoly covers markets dominated by a few interdependent firms: collusion and cartels, price wars, non-price competition, the kinked demand curve model of price rigidity, and game theory using pay-off matrices such as the prisoners' dilemma. CCEA questions often ask you to explain why oligopoly prices are sticky, interpret a pay-off matrix, or evaluate whether collusion is likely in a given market.
What you need to know
- Monopolistic competition Many firms, differentiated products, low barriers to entry and a downward-sloping demand curve. Examples include hairdressers, cafes and takeaways.
- Short and long run equilibrium Short run: firms may earn supernormal profit at MC = MR. Long run: new firms enter, each firm's demand shifts left and becomes more elastic until AR is tangent to AC and only normal profit is made. Firms have excess capacity and are not productively efficient.
- Oligopoly features A few large firms dominate, high concentration ratio, high barriers to entry, differentiated products and interdependence: each firm must consider rivals' reactions.
- Collusion and competition Firms may collude formally (cartels, illegal in the UK and EU) or tacitly (price leadership). Without collusion they may compete on price or, more often, through non-price competition such as branding, advertising and loyalty schemes.
- Kinked demand curve Assumes rivals match price cuts but ignore price rises, so demand is elastic above the current price and inelastic below. MR has a discontinuity, so MC can change without changing the profit-maximising price, explaining price rigidity.
- Game theory Pay-off matrices show outcomes for each firm's strategy. The prisoners' dilemma shows why firms may cheat on collusion even though both would gain by cooperating. A dominant strategy is best whatever the rival does.
Common mistakes in A2 1 Monopolistic Competition and Oligopoly
- Drawing the long-run monopolistic competition diagram with AR cutting AC; AR must be tangent to AC.
- Saying firms in monopolistic competition sell identical products; products are differentiated.
- Stating the kinked demand curve explains how prices are set; it explains why they are stable, not how the initial price is chosen.
- Reading pay-off matrices incorrectly, for example confusing whose pay-off is shown in each cell.
- Assuming all oligopolies collude; collusion is illegal and cartels are unstable.
Try three A2 1 Monopolistic Competition and Oligopoly exam-style questions
1. Explain why firms in monopolistic competition earn only normal profit in the long run. (4 marks)
Show the mark scheme answer
Low barriers to entry; supernormal profit attracts new firms with close substitutes; each firm's demand shifts left and becomes more elastic; continues until AR is tangent to AC so P = AC and only normal profit remains.
2. Using the kinked demand curve model, explain why prices in an oligopoly may be stable. (6 marks)
Show the mark scheme answer
If a firm raises price rivals do not follow, so demand above current price is elastic and the firm loses many sales; if it cuts price rivals follow, so demand below is inelastic and little is gained; kink at current price; gap in the MR curve; MC can shift within the gap without changing profit-maximising price and output.
3. Explain why cartels are often unstable. (4 marks)
Show the mark scheme answer
Each member has an incentive to cheat by cutting price or exceeding its quota to gain sales; prisoners' dilemma; difficult to monitor; cartels are illegal and leniency schemes reward whistle-blowers; new entrants may undercut.
A2 1 Monopolistic Competition and Oligopoly FAQs
What does CCEA A Level Economics A2 1 Monopolistic Competition and Oligopoly cover?
Short and long run equilibrium in monopolistic competition, and oligopoly features, interdependence, collusion, price and non-price competition, the kinked demand curve and game theory with pay-off matrices.
Which unit is this topic examined in?
It is in Unit A2 1: Business Economics, a 2 hour paper with short-answer questions, a case study and an open response question chosen from two.
How do I read a pay-off matrix?
For each choice your rival could make, find your best response. If the same choice is best both times, it is your dominant strategy. Then compare the outcome with what both firms could earn by cooperating.
