OCR A Level Economics
OCR A Level Economics Market Structures Exam Questions
Free OCR A Level Economics exam questions for Market Structures, with a mark scheme for every pack. Covers perfect competition, monopolistic competition, oligopoly, monopoly, contestable markets, efficiency and competition policy.
Market Structures exam questions
1 question pack of real past exam questions, each with its mark scheme. Do not stop after a few: answer as many as you can without notes, then mark every answer with the mark scheme. The more questions you do, the more quickly you will spot how examiners ask about each idea.
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A-Level Economics Flashcards for 2027 Onwards
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About OCR A Level Economics Market Structures
Market Structures is one of the most demanding parts of OCR A Level Economics Microeconomics. You compare how firms behave in perfect competition, monopolistic competition, oligopoly and monopoly, using cost and revenue diagrams to show output, price and profit in the short and long run. You assess each structure against allocative, productive, dynamic and X-efficiency, and you study contestability, barriers to entry and game theory in oligopoly. The topic links to Business Objectives and to market failure and government intervention, including competition policy. Examiners expect accurate diagrams and evaluation that weighs the possible benefits of market power against its costs.
What you need to know
- Efficiency Allocative efficiency is where P = MC, productive efficiency is at the minimum point of AC, dynamic efficiency arises from innovation over time, and X-inefficiency is when costs are higher than necessary.
- Perfect competition Many small firms, homogeneous products, perfect information and freedom of entry and exit. Firms are price takers; long-run equilibrium gives normal profit, allocative and productive efficiency.
- Monopolistic competition Many firms selling differentiated products with low barriers to entry. Short-run supernormal profits attract entry until long-run normal profit.
- Oligopoly A few interdependent firms with high barriers to entry. Concentration ratios, collusion (cartels and tacit), price leadership, non-price competition and game theory, including the prisoner's dilemma.
- Monopoly A single dominant firm with high barriers to entry, which maximises profit at MC = MR and sets price from the AR curve. Natural monopoly and price discrimination (first, second and third degree).
- Contestable markets Low entry and exit barriers and low sunk costs mean the threat of entry disciplines incumbents to keep prices close to average cost.
Common mistakes in Market Structures
- Treating MR and AR as the same for a monopoly. MR lies below AR, so the firm prices above MC.
- Drawing long-run monopolistic competition with supernormal profit. In the long run AR is tangent to AC, giving normal profit.
- Assuming oligopoly firms always collude. Interdependence can lead to competition, price wars or stable prices.
- Forgetting the conditions for price discrimination. The firm needs price-setting power, separable markets with different PEDs and no resale.
- Saying monopoly is never efficient. Economies of scale and dynamic efficiency may outweigh allocative inefficiency.
Try three Market Structures exam-style questions
1. Explain two conditions necessary for third-degree price discrimination. (4 marks)
Show the mark scheme answer
The firm must have price-setting power; markets must be separable, for example by age or time; different price elasticities of demand in each market; no possibility of resale (arbitrage) between markets.
2. Using a payoff matrix, explain why firms in an oligopoly may end up charging low prices even though they would both earn more by charging high prices. (4 marks)
Show the mark scheme answer
Each firm chooses its best strategy given the rival's choice; if one charges high, the other gains more by charging low; if one charges low, the other also does better charging low; dominant strategy is to charge low; both earn less than if they cooperated: the prisoner's dilemma.
3. Evaluate whether a monopoly can benefit consumers. (12 marks)
Show the mark scheme answer
Monopoly may exploit economies of scale, lowering costs and possibly prices; supernormal profits finance research and development and innovation (dynamic efficiency); natural monopoly avoids wasteful duplication; evaluation: price above MC leads to allocative inefficiency and lost consumer surplus; lack of competition causes X-inefficiency; benefits depend on contestability and regulation; supported judgement.
Market Structures FAQs
What does OCR A Level Economics Market Structures cover?
It covers perfect competition, monopolistic competition, oligopoly and game theory, monopoly and price discrimination, contestable markets and types of efficiency.
Which paper is Market Structures examined in?
It is examined in Paper 1, Microeconomics (H460/01) and can also appear in Paper 3, Themes in Economics.
Which diagrams should I practise for Market Structures?
Practise perfect competition (short and long run, with the market diagram alongside), monopolistic competition, monopoly with supernormal profit, natural monopoly and third-degree price discrimination.
