AP Microeconomics: Complete Study Guide and Revision Hub

AP Microeconomics: Complete Study Guide

Every microeconomics topic, ordered the way the subject actually builds — from markets and elasticity through consumer theory and costs to market structures and strategic behaviour.

How to use this page. Microeconomics is cumulative in a way most subjects are not. Market structures only make sense once you understand cost curves; cost curves only make sense once you understand production; and the whole demand side rests on consumer theory. If a later topic is not landing, the gap is almost always two units earlier. Work down the page in order, and go back rather than forward when you get stuck.

Unit 1 — Markets, Supply and Demand

How prices coordinate buyers and sellers. Everything else assumes this.

• Why Study Microeconomics? — what the subject is actually for.
• What is Demand? — demand schedules, curves and the law of demand.
• The Supply Curve — what shifts it, and what only moves along it.
• Market Equilibrium — surpluses, shortages and how markets clear.
• Changes in Market Equilibrium — including the ambiguous cases where both curves shift.

Unit 2 — Elasticity

Measuring responsiveness — and the revenue rule that follows from it.

• What is Elasticity? — introduction to PED, YED and XED.
• Price Elasticity of Demand: Complete Guide — formula, worked calculations and exam technique.
• Elasticity and the Linear Demand Curve — why elasticity changes along a straight line.

Unit 3 — Consumer Theory

Where the demand curve comes from. The most skipped unit, and the reason later topics feel arbitrary.

Utility and preferences

• Utility: Total and Marginal
• Consumer Behaviour Theory and Preferences
• Indifference Curves
• Indifference Maps and Characteristics
• Marginal Rate of Substitution

Budgets and the optimum

• Budget Constraints
• Budget Line Changes
• The Optimum Consumption Decision — where MRS equals the price ratio.

Deriving demand

• Price Consumption Curve
• Income and Substitution Effects
• The Giffen Good — the case that appears to break the law of demand.
• Network Externalities — bandwagon and snob effects.

Practise it properly

Diagrams only stick once you have drawn them yourself under exam conditions. The Economics Made Simple Complete Bundle pairs the 914-page textbook with practice questions and full mark schemes, 358 flashcards, and 100 real-world case studies.

See the Complete Bundle →

Unit 4 — Production and Costs

The supply side of the firm. Market structures are unintelligible without this.

• The Production Function
• Average and Marginal Product — and why MP cuts AP at its maximum.
• Production with a Fixed Input — the law of diminishing returns.
• Production Decisions of a Firm
• Economies of Scope

Unit 5 — Market Structures

Perfect competition, monopoly, monopolistic competition and oligopoly.

Perfect competition

• Perfect Competition: Assumptions, Equilibrium and Efficiency
• Short-Run Profit Maximisation — MR = MC and the shutdown rule.
• 10 Key Points About Perfect Competition
• The Benefits of Perfect Competition

Monopoly

• Monopoly: Marginal Revenue, Deadweight Loss and Price Discrimination
• Sources of Monopoly Power
• Monopoly Output Decision
• Monopoly Cost and Output Decision
• How a Monopolist Sets Price and Output
• Shifts in Demand Under Monopoly
• Economic Inefficiencies of Monopoly
• Perfect Competition vs Monopoly

Imperfect competition

• Monopolistic Competition
• Kinked Demand Theory of Oligopoly
• Cartel Theory of Oligopoly

Unit 6 — Game Theory, Market Failure and Welfare

Strategic behaviour, and the cases where markets do not deliver efficient outcomes.

• Game Theory: Nash Equilibrium, Dominance and Credible Threats
• Types and Strategies of Game Theory
• Game Theory Basics with a Worked Example
• Asymmetric Information: Adverse Selection and Moral Hazard
• Minimum Wage and Monopsony — where the competitive model gets labour markets wrong.
• Welfare Analysis: Hicksian Micro Foundations

This hub covers the AP Microeconomics syllabus and maps closely onto Cambridge A-Level 9708 Papers 2 and 4, and IB Economics. For the macro side, see the AP Macroeconomics guide. For everything else, see the Complete Content Library.