From the desk
Updates, syllabus notes and preparation guidance for the International Economics Olympiad — written by our mentors. New pieces land through the season.
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IEO Past Papers: Select Practice by Round Skill, Not by Year
Practising IEO past papers in year order often fails to build specific round skills. Learn how to classify questions by MCQ recall, Open Question reasoning, or Business Case defence to create balanced practice sets.
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IEO Syllabus by Round: What the MCQ, Open Questions and Business Case Each Demand
A flat IEO syllabus list is not a study plan. This guide maps broad economics topics to the specific demands of MCQ recall, Open Question writing, and Business Case strategy, helping students prepare format-aware responses rather than generic definitions.
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IEO Business Case Presentations: Defend the Assumption That Matters Most
In IEO business case presentations, judges reward the defense of critical assumptions over polished slides. Learn to identify and stress-test the single assumption that determines your model's validity.
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IEO Financial Literacy: Compare Compounding With Simple Interest in a Practice Case
A worked teaching case showing how compound interest and simple interest produce different outcomes in IEO-style financial literacy problems, with verified calculations and a contrasting trap case.
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IEO Game Theory: Find a Best Response Before Predicting an Outcome
Many IEO students struggle with game theory because they try to predict the final outcome first. This guide explains why finding the best response is the critical step, using worked examples and common pitfalls.
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IEO Externalities: Comparing a Tax, a Subsidy and a Quantity Limit
A focused guide for IEO participants on distinguishing between Pigouvian taxes, subsidies, and quantity limits when addressing externalities.
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IEO Business Case Unit Economics: Testing Whether Growth Improves the Business
Work through two teaching illustrations to learn when growth improves unit economics and when common shortcuts fail. Includes a diagnostic table and targeted practice sequence for case round preparation.
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IEO Economics Graphs: Separating a Curve Shift From Movement Along It
A focused guide for IEO candidates on distinguishing curve shifts from movements along the curve, featuring worked hypothetical examples and diagnostic tools.
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IEO OpenTrack: Is This the Right Starting Route for Your Preparation?
Understand what IEO OpenTrack actually is in the registration process and how to align your study plan with the correct competition divisions.