Is price discrimination always damaging

• →A firm practises third-degree price discrimination when it separates consumers into distinct sub-markets based on their price elasticity of demand, charging a higher price to the inelastic segment and a lower price to the elastic segment.
• →For example, a rail operator charges higher fares to business travellers whose demand is inelastic because travel is essential and time-sensitive whilst charging lower fares to students, whose demand is more elastic because they have greater flexibility over when and whether to travel.
• →To prevent arbitrage, markets must be kept separate, which is achieved through conditions such as age verification, booking restrictions, or time-of-travel requirements.
• →In the high-price market, consumers pay more than they would under competitive pricing, and consumer surplus is transferred to the producer. However, in the low-price market, output is higher than it would be under single-price monopoly, meaning some consumers gain access to the good who would otherwise have been priced out entirely.
• →Therefore, the welfare effect of third-degree price discrimination is ambiguous: it increases producer surplus and reduces deadweight loss in the low-price market, but harms consumers in the high-price market. Whether it is judged beneficial overall depends on the relative sizes of these effects and the weight given to equity versus efficiency.

→ Open full diagram → — shows the firm maximising profit across two sub-markets by setting MR = MC in each, with a higher price in the inelastic market and a lower price in the elastic market.

This question tests students' ability to evaluate the welfare effects of price discrimination under AQA spec point 4.1.5.7 — Price discrimination. Specifically, it requires candidates to distinguish between the effects on different groups of consumers, to deploy concepts such as consumer surplus, producer surplus, and deadweight welfare loss, and to construct a sustained evaluative argument rather than a one-sided account. Strong answers are expected to acknowledge that the impact varies with the degree of price discrimination, the market structure in which it occurs, and the particular consumer group under consideration. The highest marks require candidates to reach a supported judgement rather than simply listing advantages and disadvantages.

Examined 2 times across AQA since 2020.

Both appearances have been at the full 25-mark tariff on Paper 1, using evaluative command words, which indicates that examiners expect a structured, two-sided argument culminating in a justified conclusion rather than a descriptive account of how price discrimination operates.