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13/25 — Level 3

In plain English: you're in the middle band — there's decent knowledge here and some analysis, but your evaluation is surface-level and your chains of reasoning keep stopping one step too early. This is a solid C but you're leaving B and A marks on the table.

What you did well

Your definition of oligopoly is spot on — few dominant firms, high concentration ratio, interdependence. The kinked demand curve reference shows you know the theory. And using Tesco and Aldi as your real-world examples was a smart choice — it's current and relevant to the question.

What's holding you back

Your chains of reasoning stop one step short every time. You said "firms collude to keep prices high → consumers pay more." That's true but it's only a two-step chain. Push it further: "Tacit collusion between oligopolists → prices held above the competitive level → consumers face higher prices AND reduced choice → allocative inefficiency because price exceeds marginal cost → welfare loss shown by the deadweight loss triangle on a monopoly diagram." Each extra step is marks.

You barely mentioned non-price competition. You focused almost entirely on price, but oligopolies compete heavily on branding, loyalty schemes, and product differentiation. This HELPS consumers — better quality, more innovation, more variety. You need this as your counter-argument because the question says "always" — if you can show ONE way oligopolies benefit consumers, the word "always" falls apart.

Your evaluation is "however on the other hand" tennis. You keep going: point for consumers, point against consumers, point for, point against. That's not evaluation — that's just listing both sides. Real evaluation means weighing them: "The consumer harm from tacit collusion is likely to OUTWEIGH the benefits of innovation because price increases are immediate and affect all consumers, whereas innovation benefits are uncertain and unevenly distributed. However, this depends on the strength of the competition regulator — in the UK, the CMA's investigation into the fuel market in 2023 suggests regulators are increasingly willing to intervene."

No diagram. You mentioned the kinked demand curve but didn't draw it. Draw it AND explain it: "The kinked demand curve at price P1 shows why oligopolists are reluctant to change prices — if one firm raises its price, rivals won't follow and the firm loses market share (elastic demand above the kink). If it cuts price, rivals match it immediately, so the firm gains very little extra demand (inelastic below the kink). This price rigidity means consumers are stuck paying the same price regardless of changes in costs."

The biggest thing that would boost your mark

Attack the word "always" in the question. Right now you're arguing both sides but never making a judgement about whether oligopolies ALWAYS work against consumers. Your conclusion should say something like: "Oligopolistic markets do not ALWAYS work against consumers — in contestable oligopolies with low barriers to entry, the threat of new entrants forces existing firms to keep prices competitive and invest in quality. The degree of consumer harm depends on the level of contestability, the effectiveness of regulation, and whether competition is primarily on price or non-price factors."

Your weakest paragraph — rewritten

You wrote: "On the other hand oligopolies can benefit consumers through economies of scale which lead to lower prices being passed on."

A* version:

However, oligopolies can generate significant economies of scale — Tesco's buying power allows it to negotiate lower wholesale prices from suppliers, and its £1bn+ investment in automated distribution centres has reduced unit costs substantially. If these cost savings are passed on to consumers through lower prices, then oligopoly actually IMPROVES consumer welfare compared to a market of smaller firms that can't achieve these scale efficiencies. The key question is whether firms DO pass savings on — and evidence from the UK grocery market suggests they partly do, since real food prices fell by approximately 3% between 2015 and 2019 despite rising input costs. This challenges the view that oligopolies 'always' harm consumers.

What changed: took the vague claim about economies of scale and added a specific real-world example (Tesco), actual data (real food prices), and linked it directly back to the question word "always." That's how you turn a Level 3 paragraph into Level 5.

The knowledge and structure are already there — you're closer than you think. The main thing is pushing every chain of reasoning two steps further and making your evaluation actually WEIGH the arguments instead of just listing them. Keep going 💪