QCE Economics - Unit 2 - Case options

Competition policy and concentration evaluation

Evaluate theories of harm, merger counterfactuals, ACCC and court roles, remedies and dynamic efficiency.

Part of the free QCE Economics notes library for Unit 2: Case options.

Updated 2026-08-13 - 6 min read

Competition policy protects the competitive process, not every incumbent competitor. Start with a theory of harm: how could structure enable conduct that changes price, output, quality, choice, supplier terms or innovation?

A merger counterfactual is the likely market without the merger, not simply last year's shares. Consider future entry, expansion and technological change. Low prices can be vigorous rivalry, so predatory-pricing analysis needs cost, exclusion and recoupment evidence. Supplier harm can arise through buyer power even if short-run consumer prices do not rise.

The ACCC investigates and administers parts of competition law; courts make legal determinations in litigated matters. Keep these roles distinct. Remedies can include prohibition, access conditions, divestiture, data portability or conduct rules. Each remedy can create compliance costs or new entry barriers.

A final judgement should state the criterion, counterfactual, stakeholders and time horizon. Dynamic efficiency matters because a remedy that lowers short-run price could strengthen or weaken investment and innovation.

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Classroom deep dive

The model in full

Competition policy seeks to protect the competitive process rather than guarantee a particular competitor's success. The ACCC investigates and enforces relevant competition and consumer law, assesses certain mergers and can seek court orders; courts determine breaches and remedies under law. Economic evaluation asks whether conduct or structure weakens competitive constraints enough to raise price, reduce output, quality or innovation, disadvantage suppliers or create other social costs. Responses include prohibitions, penalties, access rules, divestiture or merger conditions, information and switching reforms, procurement design and removal of unnecessary entry barriers. Each can also alter scale economies, investment certainty and administrative burden.

Concepts your explanation must connect

1. High price is not alone proof of power because cost, quality and scarcity can change; persistent price–cost margins, exclusionary conduct, weak switching and blocked entry strengthen the inference.
2. Private costs and benefits accrue to transacting firms and consumers; social analysis adds external effects, public administration, distribution and future innovation.
3. The ACCC is not the final court and does not set every industry price. Accurate institutional explanation distinguishes investigation, administrative decisions, undertakings and judicial determination.

Construct the reasoning, one link at a time

1. Link 1: State the suspected conduct or structural change and define the theory of harm: how is the competitive constraint weakened?
2. Link 2: Select evidence on counterfactual price, output, quality, entry, suppliers, innovation and external effects, including perspectives and assumptions.
3. Link 3: Compare no action and feasible remedies for allocative, productive and dynamic efficiency, distribution, legal fit and implementation risk.
4. Link 4: Make a bounded decision using one explicit criterion, specify monitoring indicators and acknowledge evidence that would reverse the judgment.

After constructing the chain, inspect every arrow. An arrow should represent an incentive, accounting flow, behavioural response, curve movement or institutional constraint. If it represents only chronology, it has not yet explained the outcome. State the relevant market, decision-maker, time horizon and ceteris paribus condition where each matters.

Fully worked reasoning

Notice that the conclusion is narrower than the whole topic. It answers the supplied problem, preserves its units and assumptions, and does not convert a conditional model into a universal claim. In calculations, show the formula, substitution, working and unit. In graphs, label axes, original and new curves, equilibrium points and the direction of change.

Economic inquiry workshop

QCAA's inquiry process moves through forming, selecting, analysing and evaluating. Use that sequence rather than collecting data first and inventing a question later.

Form. Did a competition intervention improve market outcomes relative to a credible counterfactual?

Select. Choose a completed case, construct a timeline and compare price, output, quality, entry, investment and complaint indicators with similar unaffected markets or pre-trends.

Analyse. Use regulator and court documents plus industry, consumer and independent sources; distinguish legal finding from economic effect and test alternative explanations.

Evaluate. Remedies target selected risks and market conditions keep changing. Avoid attributing every later outcome to the intervention and report enforcement or compliance uncertainty.

For every dataset, record publisher, exact series or table, units, observation period, release date, adjustment basis and revision status. Current evidence means the newest appropriate observation available—not merely a recently updated webpage. Triangulate the model with direct determinant evidence and at least one plausible competing explanation.

Misconception clinic

Repair: Courts determine contested breaches; policy protects competitive conditions and consumers, not inefficient incumbency; structural remedies can sacrifice scale or investment and require counterfactual evaluation.

A useful correction names the first broken definition or causal link, rebuilds from that point, and explains why the revised conclusion follows. Adding terminology to the original claim without changing its logic is not a repair.

Unfamiliar transfer

For any proposed merger or platform rule, write the theory of harm in one causal chain and test each link with market-specific evidence before selecting a remedy.

Use this response frame:

1. Define the unfamiliar context and the relevant economic variable.
2. Reconstruct the model rather than copying the worked conclusion.
3. Calculate or graph the change with labels and units.
4. Trace the mechanism and identify a countervailing channel.
5. Evaluate against a named criterion for specified stakeholders and time horizons.
6. State which fresh evidence would resolve the remaining uncertainty.

Final verification: Separate institution roles, structure, conduct and outcome; compare at least two feasible responses under named efficiency and social criteria and state a review metric.

Syllabus mapping

This lesson explicitly addresses the following mapped QCAA statements:

• Analyse and evaluate market concentration issues, e.g. private and social costs and benefits of concentrated markets (e.g. under-provision of goods, and positive and negative externalities), and support with diagrams
• Analyse and evaluate market concentration issues, e.g. the role of the Australian Competition and Consumer Commission (ACCC) and the courts in reducing anticompetitive behaviour
• Analyse and evaluate market concentration issues, e.g. government strategies and/or interventions to increase competition in markets to achieve more efficient market outcomes, e.g. in oligopolistic industries such as banking, grocery and petroleum, and considering different perspectives.
• Create responses that communicate economic meaning using data, information, graphs and diagrams in paragraphs and extended responses to suit the intended purpose.

Sources

• QCAA, Economics 2025 v1.4 syllabus (March 2026)
• QCAA, Economics senior subject page
• QCAA, Economics 2025 v1.4 syllabus amendment report
• ACCC, Supermarkets inquiry final report, February 2025

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