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IAI Actuarial Core Principles · Business Economics

Main Economic Schools and Their Key Features

The main economic schools are competing frameworks for explaining how economies work: Classical, Marxian, Neoclassical, Keynesian, Monetarist, New Classical, New Keynesian, Austrian, plus behavioural and institutional ideas. For each, learn the core claim, the role of government, and the policy it implies. Then compare them in short written answers.

What this chapter covers

This chapter is the opening block of CB2 Business Economics. It surveys the main schools of economic thought and shows how each one explains output, prices, employment and the role of the state. You start with basic concepts such as scarcity, opportunity cost and the difference between positive and normative statements. Then you move through the schools roughly in the order they developed.

The chapter is about ideas, not calculations. For each school you need the central belief, the key thinkers, the view on markets and government, and the typical policy conclusion. Examiners tend to reward clear comparison: where two schools agree, where they split, and why.

The chapter links directly to the larger parts of the paper. Microeconomics and macroeconomics both rest on these debates. Neoclassical ideas sit behind supply, demand and firm behaviour. Keynesian and monetarist ideas sit behind fiscal policy, monetary policy, inflation and unemployment. If you know the schools well, later chapters become easier to place and to argue.

The 2026 syllabus gives this topic a small weighting within CB2, so it is a light chapter compared with microeconomics and macroeconomics. That makes it good value for effort: it is short, mostly descriptive, and can be learned in a few sittings. It also gives you vocabulary and a framework for the written answers in later chapters, where you are often asked to explain a policy from a particular viewpoint. Weak understanding here costs you marks in multiple-choice questions on definitions and in written comparisons.

Main economic schools and their key features: topics in the order to study them

  1. 1Economic Way of Thinking and Basic ConceptsScarcity, opportunity cost, positive versus normative and models are the vocabulary every school uses, so learn them first.
  2. 2Classical EconomicsThis is the starting point: self-correcting markets and limited government, which later schools react to.
  3. 3Marxian EconomicsIt is an early critique of the classical view, so it comes next as a contrast on class, labour and capital.
  4. 4Neoclassical Economics and MarginalismIt reshapes the classical ideas with marginal analysis and underpins today's microeconomics.
  5. 5Keynesian EconomicsIt challenges the self-correcting view by stressing demand and unemployment, and it sets up the macro debates that follow.
  6. 6Monetarism and the Chicago SchoolIt is the main counter to Keynesian thinking, focused on money supply and rules over discretion.
  7. 7New Classical, New Keynesian and Austrian SchoolsThese build on or respond to the earlier debates, so they are easier once you know both Keynesian and monetarist positions.
  8. 8Behavioural, Institutional and Recent ApplicationsThese modern strands question the rational-agent assumption, so they make sense last, after you know what is being questioned.

How to prepare Main economic schools and their key features

This is a comparison chapter. Build understanding school by school, then tie the schools together so you can answer both short and long questions.

  1. Read the basic concepts topic and write your own one-line definition of each term, such as opportunity cost and positive versus normative.
  2. For each school, make a small note card with five items: period and key thinkers, main belief, view of markets, role of government, and typical policy.
  3. Put the schools on a timeline and write one line on what each one was reacting to. This makes the order stick and helps you explain differences.
  4. Build a comparison grid yourself on paper, with schools down the side and themes across: markets, unemployment, money, government. Fill it from memory, then check.
  5. Practise short written answers of a few lines, such as explaining why Keynesians and monetarists disagree on policy. State the view of each side, then the reason.
  6. Answer multiple-choice questions on who believed what. Check why each wrong option belongs to a different school.
  7. In the last days, redo the grid and the timeline without notes and fix the gaps.

Common mistakes in Main economic schools and their key features

  • Mixing up what different schools believe, for example attributing rational expectations to Keynesians.

    Fix: Learn each school as a one-line belief plus a policy conclusion, and test yourself with the comparison grid.

  • Writing a list of facts in a comparison question instead of actually comparing.

    Fix: Structure the answer around a theme such as unemployment or inflation, then say how each school treats it and why they differ.

  • Confusing positive and normative statements.

    Fix: Ask whether the statement could be checked against evidence. If yes, it is positive. If it contains a value judgement, it is normative.

  • Treating the schools as completely separate or one simply replacing another.

    Fix: Note what each school keeps from earlier ones and what it rejects. Modern analysis uses ideas from several schools.

  • Ignoring this chapter because its weighting is small.

    Fix: Give it a few focused sessions. It is descriptive, quick to learn and supports your later written answers.

Last-day revision: Main economic schools and their key features

  • Scarcity forces choice, and opportunity cost is the value of the best alternative given up.
  • Positive statements describe what is; normative statements say what ought to be.
  • Classical economics: markets self-correct, government should be limited.
  • Marxian economics: focuses on class conflict between capital and labour, and critiques capitalism.
  • Neoclassical economics: uses marginal analysis and rational choice to explain prices and allocation.
  • Keynesian economics: total demand drives output, and markets can stay below full employment, so government demand management can help.
  • Monetarism: money supply growth is the key driver of inflation, and policy should follow rules.
  • The Chicago School generally favours free markets and limited intervention.
  • New Classical economics: rational expectations make systematic policy less effective.
  • New Keynesian economics: wage and price stickiness can justify policy action.
  • Austrian school: stresses individual choice, entrepreneurship and distrust of central planning.
  • Behavioural economics: real people show biases and use rules of thumb, not perfect rationality.

Main economic schools and their key features practice questions

Main economic schools and their key features: frequently asked questions

How should I remember the differences between the economic schools?

Use a grid with schools down the side and themes such as markets, unemployment, money and government role across the top. Fill it from memory repeatedly. Add the school each one reacted against, since this explains most of the differences.

Do I need to know the names of economists for CB2?

Link the main thinkers to their schools, since this helps with multiple-choice questions and written explanations. Focus more on the ideas than on biographical detail. The ideas are what you apply in answers.

Is this chapter mostly multiple-choice or written?

It can be examined either way. Exams combine multiple-choice and written questions, so be ready to identify a school from a description and also to explain and compare views in a few clear lines.

How is this chapter connected to macroeconomics in CB2?

The Keynesian, monetarist and new classical debates are the base for later topics on fiscal policy, monetary policy, inflation and unemployment. Learning them here makes the macroeconomics chapters easier to follow.