OxfordAQA International A Level Economics
OxfordAQA International A Level Economics 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly Exam Questions
Free OxfordAQA International A Level Economics revision for 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly: what you need to know, common mistakes and exam-style questions with answers. Covers perfect competition, monopolistic competition, oligopoly, monopoly, price discrimination, contestable markets, efficiency, consumer surplus and competition policy.
Practise 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly with past papers
Once you have learnt this topic, find the 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly questions in real OxfordAQA International 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 OxfordAQA International A Level Economics 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly
This is the largest section of Unit 3 on the OxfordAQA International A2 Economics course. You analyse perfect competition, monopolistic competition, oligopoly and monopoly using cost and revenue diagrams, then study price discrimination, contestable markets and the dynamics of competition. You evaluate outcomes using static and dynamic efficiency and consumer and producer surplus. Finally you consider government responses: competition policy, public ownership, privatisation, regulation and deregulation. It builds directly on 3.3.2. Examiners frequently ask for accurate short-run and long-run diagrams, explanations of collusion and the kinked demand curve, and essays evaluating whether monopoly or regulation benefits consumers.
What you need to know
- 3.3.3.2 Perfect competition Many firms, identical products, perfect information and free entry. Firms are price takers. Supernormal profit attracts entry until only normal profit is made in the long run, where P = MC = minimum AC, giving allocative and productive efficiency.
- 3.3.3.3 and 3.3.3.4 Monopolistic competition and oligopoly Monopolistic competition has many firms with differentiated products and free entry, so long-run profit is normal. Oligopoly has a few interdependent firms and high barriers; firms may compete on non-price factors, collude, or follow a kinked demand curve that explains price stability.
- 3.3.3.5 and 3.3.3.6 Monopoly and price discrimination A monopolist maximises profit where MC = MR and charges a price above MC, causing a deadweight loss. Price discrimination charges different prices to different groups for the same product; it requires market power, separable markets and different price elasticities.
- 3.3.3.7 and 3.3.3.8 Contestability and dynamics In a contestable market low entry and exit barriers and no sunk costs mean the threat of entry keeps prices near competitive levels. Creative destruction describes innovation replacing existing products and firms.
- 3.3.3.9 and 3.3.3.10 Efficiency and surplus Static efficiency includes allocative efficiency (P = MC) and productive efficiency (output at minimum AC). Dynamic efficiency is improvement over time through investment and innovation. Consumer surplus and producer surplus measure welfare.
- 3.3.3.11 and 3.3.3.12 Policy Competition policy controls mergers, cartels and abuse of dominance. Governments may use public ownership, privatisation, regulation such as price caps, and deregulation.
Common mistakes in 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly
- Drawing a monopolist producing where MR cuts AR or where AC is lowest. Output is where MC = MR, and price is read up to the AR curve.
- Saying perfectly competitive firms make supernormal profit in the long run. Entry removes it, leaving normal profit.
- Ignoring dynamic efficiency when evaluating monopoly. Supernormal profit can fund research and development.
- Explaining price discrimination without the conditions. Firms must be able to separate markets with different PEDs and prevent resale.
- Claiming collusion is how all oligopolies behave. Many compete, and game theory shows why collusion can break down.
Try three 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly exam-style questions
1. State the conditions needed for a firm to practise price discrimination. (3 marks)
Show the mark scheme answer
The firm must have some price-setting (monopoly) power; it must be able to separate consumers into markets with different price elasticities of demand; and it must prevent resale between the markets.
2. Explain why a perfectly competitive market is allocatively and productively efficient in the long run. (4 marks)
Show the mark scheme answer
Free entry and exit remove supernormal profits so firms produce at the minimum point of AC, which is productive efficiency; firms are price takers and maximise profit where P = MR = MC; price equals marginal cost, which is allocative efficiency.
3. Evaluate the view that oligopoly markets always work against the interests of consumers. (25 marks)
Show the mark scheme answer
A strong answer would explain interdependence, high barriers to entry, the incentive to collude and the risk of higher prices and restricted output, using the kinked demand curve or game theory; then evaluate with non-price competition improving quality and choice, economies of scale, dynamic efficiency from investment, contestability, the role of competition policy and how collusion can break down; and reach a judgement that depends on the degree of competition and regulation in particular markets.
3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly FAQs
What does OxfordAQA International A Level Economics 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly cover?
It covers perfect competition, monopolistic competition, oligopoly, monopoly, price discrimination, contestable markets, efficiency, consumer and producer surplus, competition policy and regulation.
Which unit is 3.3.3 Perfect Competition, Imperfectly Competitive Markets and Monopoly examined in?
It is examined in Unit 3 (EC03), The economics of business behaviour and the distribution of income, an A2 unit with multiple choice, short answer, data response and essay sections.
How do I write a good market structure essay?
Use accurate diagrams with MC = MR clearly marked, explain efficiency in terms of P = MC and minimum AC, and evaluate using dynamic efficiency, contestability and examples of real firms or regulators.
