How much should I write for each IB Economics command term?

There is no official fixed word count for each command term. Use the mark allocation, available time, paper format, and complexity of the question to judge length. State or list usually requires brief answers, while explain needs a developed causal chain. Evaluate, discuss, and to what extent normally require sustained analysis, counterarguments, and a supported conclusion. A useful check is whether every sentence performs a task required by the command term rather than merely adding background information.

What is the difference between describe and explain in IB Economics?

Describe asks for a detailed account of what something looks like, how it changes, or what features it has. Explain goes further by including reasons, causes, or the mechanism connecting one change to another. For example, describing a graph might mean reporting that inflation increased from 3% to 5%. Explaining the increase would require a cause, such as higher production costs shifting short-run aggregate supply to the left. If you could add “because” and “therefore” to your reasoning, you are more likely to be explaining rather than only describing.

What is the difference between discuss and evaluate?

Discuss requires a considered and balanced review that includes a range of arguments, factors, or perspectives. Evaluate asks you to appraise an issue by weighing strengths and limitations against relevant criteria. Both normally need supported reasoning and a clear conclusion, so their practical answer structures may overlap. Evaluation should make the basis of judgment especially explicit, such as effectiveness, equity, sustainability, cost, or the time period involved. Discussion should not become a disconnected list of views, and evaluation should not become a simple advantages-and-disadvantages table.

Do all IB Economics explain questions require a diagram?

Not every explain question explicitly requires a diagram, and the wording and mark allocation should guide your decision. However, a relevant, accurate diagram is often an efficient way to support explanations of economic models and relationships. The diagram must have correctly labelled axes, curves, shifts, and equilibria, and your writing should refer to those features. A diagram without explanation cannot replace the causal reasoning requested by explain. If a diagram adds no relevant economic reasoning or consumes disproportionate time, a precise written explanation may be more appropriate.

Does an evaluate question always need a conclusion?

An evaluate question should normally end with a clear, supported overall judgment. The conclusion should answer the precise question rather than repeat the preceding paragraphs. It can identify the most important condition, stakeholder, time period, or criterion affecting the result. For example, you might conclude that an indirect tax is more effective in the long run when demand becomes more elastic and enforcement prevents illegal substitution. Avoid absolute claims unless the evidence genuinely supports them, because strong Economics conclusions are often conditional.

How can I memorise IB Economics command terms effectively?

Begin by grouping the terms according to AO1, AO2, AO3, and AO4 rather than memorising one long alphabetical list. Create flashcards with the official expectation on one side and a small Economics question on the other. Next, classify practice questions by command term and plan the answer structure before writing. Watching worked solutions is particularly effective because it shows how the required depth appears in an actual response. Finish by rewriting weak answers and checking whether each paragraph performs the task signalled by the command term.

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IB Economics Command Terms Explained

RevisionDojo Team

•Last updated: 5 Aug 2026•14 min read

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IB Economics Command Terms Explained

RevisionDojo Team

•Last updated: 5 Aug 2026•14 min read

Add as a preferred source on Google

IB Economics command terms tell you what kind of answer to produce and how deeply to develop it. A student who explains when asked to state may waste time, while a student who merely describes when asked to evaluate will not demonstrate the required judgment. The command term must therefore shape your content, structure, use of diagrams, and conclusion.

The current IB Economics course organizes these terms around four assessment objectives, progressing from knowledge and understanding to application, analysis, synthesis, evaluation, and subject-specific skills. This guide explains the most important terms, shows what they look like in Economics answers, and clarifies how to practise them effectively.

Why IB Economics command terms matter

The IB describes command terms as words or phrases that indicate what a question requires, including the expected type and depth of response. They are not optional stylistic suggestions. They communicate the intellectual task being assessed.

The Economics guide groups command terms according to four assessment objectives:

Assessment objective	Main demand	Common command terms
AO1: Knowledge and understanding	Recall and communicate economic knowledge	Define, describe, list, outline, state
AO2: Application and analysis	Apply theory and show relationships	Analyse, apply, comment, distinguish, explain, suggest
AO3: Synthesis and evaluation	Construct arguments and make evidence-based judgments	Compare, discuss, evaluate, examine, justify, recommend, to what extent
AO4: Appropriate skills	Use calculations, data, and diagrams	Calculate, construct, derive, determine, draw, identify, label, plot, show, sketch, solve

This hierarchy explains why state and evaluate cannot be answered in the same way. However, it does not create a universal word count for each term. The mark allocation, available time, paper format, and exact focus of the question still determine how long an answer should be.

The official IB Economics subject brief also shows why command-term fluency matters. The assessment model tests knowledge, application, analysis, evaluation, diagrams, data interpretation, and quantitative techniques rather than recall alone.

AO1 command terms: precise knowledge

AO1 answers should be accurate and direct. Extra material does not compensate for an imprecise definition or a failure to answer the exact question.

Term	Official expectation	What to write	Economics example
State	Give a specific name, value, or brief answer without explanation or calculation	One direct fact or result	“State one determinant of demand.” Answer: Consumer income.
List	Give a sequence of brief answers without explanation	Separate items, usually one per available mark	“List two functions of money.” Answer: Medium of exchange; store of value.
Define	Give the precise meaning of a word, phrase, concept, or quantity	A concise definition using economic terminology	“Define opportunity cost.” Answer: The value of the next best alternative forgone when a choice is made.
Outline	Give a brief account or summary	Main feature plus limited clarification	“Outline one effect of inflation on savers.” Explain briefly that purchasing power may fall when interest earnings do not keep pace with inflation.
Describe	Give a detailed account	Report characteristics, patterns, or changes without necessarily explaining why	“Describe the change in unemployment shown in the data.” State direction, size, period, and relevant units.

A common mistake is treating outline as another word for state. An outline normally needs a brief account, not just a label. Conversely, a state question does not need a paragraph of causes, consequences, and evaluation.

AO2 command terms: application and analysis

AO2 requires movement beyond recall. You must use economic knowledge to explain mechanisms, interpret information, or apply theory to a context.

Explain and analyse

Explain means giving a detailed account that includes reasons or causes. A strong Economics explanation usually follows a causal chain:

initial change → economic mechanism → intermediate effect → final outcome

For example, consider: “Explain how a decrease in interest rates may reduce unemployment.” A complete answer could show that lower interest rates reduce borrowing costs, encouraging consumption and investment. Aggregate demand may rise, leading firms to increase output and derived demand for labour, which can reduce cyclical unemployment.

A relevant AD/AS diagram can strengthen this explanation, but the diagram must be correctly labelled and discussed in the text. A diagram placed beside an unrelated paragraph does not explain itself.

Analyse means breaking something down to reveal its essential elements or structure. In Economics, this often requires identifying connected causes, effects, stakeholders, or relationships. When analysing currency appreciation, for example, you might separate the effects on export prices, import prices, net exports, aggregate demand, inflation, and employment.

Apply, distinguish, comment, and suggest

Apply requires using an economic idea, equation, or theory in relation to the situation provided. Refer to the case, extract, or numerical information rather than reproducing a generic textbook answer.
Distinguish requires clear differences between two or more concepts. Define both sides through a direct contrast, such as explaining that economic growth concerns increased real output while economic development involves broader improvements in well-being.
Comment requires a judgment based on a statement or calculation. After calculating a price elasticity of demand of 0.4, for example, state that demand is price inelastic and explain what the result implies in context.
Suggest requires a plausible solution, hypothesis, or possible answer. The proposal must fit the information given, but it usually does not require the extensive weighing expected by evaluate.

The RevisionDojo IB Economics Questionbank is useful for practising these distinctions because you can compare how short and extended responses change with the command term.

AO3 command terms: argument and judgment

AO3 terms carry the greatest evaluative demand. A strong answer develops economic reasoning, considers relevant alternatives or limitations, uses evidence, and reaches a supported judgment.

Term	Required approach	Essential feature
Compare	Explain similarities while referring to both items throughout	Direct, paired comparison
Contrast	Explain differences while referring to both items throughout	Direct, paired differences
Compare and contrast	Address both similarities and differences	Balanced treatment of both items
Discuss	Offer a considered and balanced review of arguments or factors	Multiple supported perspectives and a clear conclusion
Evaluate	Appraise by weighing strengths and limitations	Criteria-based judgment rather than a list of pros and cons
Examine	Investigate an argument or concept to uncover assumptions and relationships	Careful exploration beneath the surface claim
Justify	Give valid reasons or evidence supporting an answer or conclusion	Explicit defence of the chosen position
Recommend	Present an appropriate course of action	Contextual choice supported by economic evidence
To what extent	Consider the merits or otherwise of a claim	A judgment about degree, conditions, or scope

What evaluation looks like in Economics

Suppose the question asks you to “Evaluate the effectiveness of an indirect tax in reducing the consumption of cigarettes.” Explaining the tax diagram and higher consumer price establishes the mechanism, but it is not yet a full evaluation.

Evaluation might consider:

Price elasticity of demand: If demand is inelastic because cigarettes are addictive, consumption may fall only slightly.
Time period: Demand may become more elastic in the long run as consumers adjust.
Equity: The tax may be regressive if lower-income households spend a greater proportion of income on cigarettes.
Government revenue: Revenue could finance healthcare or cessation programmes.
Unintended consequences: A large tax differential may encourage informal or illegal markets.
Alternatives: Regulation, education, or subsidies for cessation products may complement the tax.

The conclusion should answer the question conditionally: the tax may reduce consumption, but its effectiveness depends on elasticity, tax size, enforcement, and complementary policies. That is stronger than saying simply, “There are advantages and disadvantages.”

AO4 command terms: calculations and diagrams

AO4 terms assess the correct use of economic skills. Accuracy of method and presentation matters as much as reaching the final answer.

Calculate: Show the relevant working, substitute values correctly, and give an answer with suitable units where applicable.
Determine: Obtain the only possible answer, using the information provided.
Draw: Produce an accurate, labelled diagram or graph.
Sketch: Show the general shape or relationship, including relevant labels and features.
Construct: Display information in a diagrammatic or logical form.
Identify: Select or provide the appropriate answer from the available information.
Plot: Mark points accurately using the given scale and data.
Show or show that: Present the steps needed to establish the specified result.

For an elasticity calculation, do not write only “PED = 1.5.” Show the formula, substitution, numerical result, and interpretation if the question asks for it. For a diagram, label axes, curves, equilibria, shifts, and relevant areas clearly, then refer to those labels in any accompanying explanation.

How to match your answer to the command term

Use this five-step process when reading any Economics question:

Circle the command term. Decide whether the task is recall, explanation, evaluation, or a technical skill.
Identify the economic content. Underline the policy, model, market, stakeholder, or data being tested.
Check the marks and context. These indicate the amount of development and application required.
Plan the answer shape. A state response may be one line; an explain response needs a causal chain; an evaluate response needs arguments, limitations, and judgment.
Audit the final answer. Ask whether you actually performed the command rather than merely writing about the topic.

The fastest way to internalise this is to watch and review many questions being worked through. Seeing an expert turn the wording into an answer structure makes the difference between describe, explain, and evaluate much easier to recognize. Use the IB Economics resource hub and its per-question worked or video solutions where available, then reproduce the structure without looking.

You can also practise narrower sets through the Microeconomics Questionbank, review terminology with Macroeconomics flashcards, and use Economics predicted papers for timed paper-level practice with model answers and available video solutions.

Common command-term mistakes

Writing everything you know: Relevant selection matters more than volume.
Describing instead of explaining: Saying what happens does not establish why it happens.
Explaining instead of evaluating: A correct mechanism still needs strengths, limitations, conditions, and judgment when evaluation is requested.
Separating comparisons: Writing one paragraph about A and another about B can hide the actual similarity or difference. Compare them point by point.
Adding an unsupported conclusion: A judgment must follow from the analysis and evidence presented.
Ignoring the context: Extracts, data, and real-world examples should influence the answer rather than appear as decoration.
Assuming every long answer needs the same template: Structure should follow the exact command term and question focus.

The RevisionDojo guide to structuring IB answers provides a useful review checklist. Jojo AI can then help identify whether a response contains a genuine causal chain, application, or supported judgment rather than only relevant vocabulary.

Conclusion

IB Economics command terms determine the intellectual task and expected depth of an exam response. State, list, and define reward precision; explain and analyse require mechanisms and relationships; discuss, evaluate, and to what extent require balanced reasoning and defensible judgments; and AO4 terms require visible technical working.

Learn the definitions, but do not stop at memorisation. The most effective preparation is repeated exposure to worked questions followed by independent practice. RevisionDojo’s Economics Questionbank, per-question solutions, videos, flashcards, and predicted papers can help you see how each command term changes the structure of a successful answer.

Sources and referenced URLs

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