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  • IB Business Management
    • 01 Business Organization and the Environment >
      • 1.1 Introduction to Business Management
      • 1.2 Types of business organizations
      • 1.3 Organizational objectives
      • 1.4 Stakeholders
      • 1.5 External Environment
      • 1.6 Growth and Evolution
      • 1.7 Organizational planning tools
    • 02 Human Resources >
      • 2.1 Human Resource Planning
      • 2.2 Organizational Structure
      • 2.3 Leadership and Management
      • 2.4 Motivation
      • 2.5 Organizational and corporate cultures
      • 2.6 Employer and employee relations
    • 03 Finance and Accounting >
      • 3.1 Sources of finance
      • 3.2 Costs and revenues
      • 3.3 Break-even analysis
      • 3.4 Financial Accounts
      • 3.5 & 3.6 Ratio Analysis
      • 3.7 Cash flow
      • 3.8 Investment appraisal
      • 3.9 Budgets
    • 04 Marketing >
      • 4.1 The Role Marketing
      • 4.2 Marketing Planning
      • 4.3 Sales Forcasting
      • 4.4 Market Research
      • 4.5 Product >
        • 4.5 Price
        • 4.5 Promotion
        • 4.5 Place
      • 4.7 International Marketing and Globalization
    • The Exam
  • IB Economics
    • 01 Microeconomics >
      • 1. The Foundations of Economics
      • 1.1 Demand and Supply
      • 1.2 Elasticities
      • 1.3 Government Intervention
      • 1.4 Market Failure
    • 02 Macroeconomics >
      • 01 Level of Economic Activity
      • 2.2 Aggregate Demand
      • 2.3 Aggregate Supply
      • 2.4 Macroeconomic Equlibruim
      • 2.5 Unemployment
      • 2.6 Inflation
      • 2.7 Economic Growth
      • 2.8 Equity in the distribution of income
    • 03 International Economics >
      • 3.1 Free Trade
      • 3.2 Protectionism
      • 3.3 Exchange Rates
      • 3.4 Balance of Payments
      • 3.5 Economic Integration
    • 04 Development Economics >
      • 4.1 Economic Development
      • 4.2 Measuring Development
    • 05 Exam Preparation
  • Individuals & Societies 8
    • 01 Belief systems and their influence on culture
    • 02 How are societies governed?
    • 03 Japan 1603 - 1945: Isolation and then expansion
    • 04 What are natural hazards and how do societies respond to them? Case Study: Japan
  • Individuals & Societies 7
    • 01 The Individuals and Societies Toolbox
    • 02 Economic Growth and Development
    • 03 Where are all the people?
    • 04 How has globalization shaped the world?
  • AP World History
    • Free Response Questions
    • 10,000 BCE - 600CE
    • 600 - 1450
    • 1450 - 1750
  • AP Human Geo
    • 01 Geography its nature and perspectives
    • 02 Population and Migration
    • 03 Cultural Geography
    • 04 Political Geography
    • 05 Urban Geography
    • 06 Economic Geography
    • 07 Agricultural Geography
    • Exam Review
  • Previously Taught Courses
    • G12 Economics >
      • Basic Economic Ideas
      • Producing and Consuming
      • Financial Capability
      • Managing the Economy
    • G10 World History >
      • 01 Exploration, Scientific Revolution and the Enlightenment
      • 02 The American Revolution
      • 03 France: Absolute Monarchy & Revolution
      • 04 The Industrial Revolution
      • 05 Imperialism and Nationalism
      • 06 WW1
      • 07 Inter-War Period
      • 08 WW2
    • G9 World History >
      • 01 Human beginnings and early civilizations
      • 02 Mediterranean Classical Civilizations (Greece) >
        • Mediterranean Classical Civilizations (Rome)
      • 03 Classical China
      • 04 The Muslim World
      • 05 Interregional Networks and Contacts 500 - 1450
      • 06 The Renaissance and Reformation >
        • Oral Presentations
    • G9 Social Studies >
      • History >
        • Analyzing Sources
      • Geography
    • G7 Social Studies >
      • Introduction to Empowerment
      • Economic Empowerment
      • Political Empowerment
      • Cultural Empowerment
      • National Empowerment
      • 04 Resources and the environment
      • Finance and Accounting >
        • 3.1 Sources of finance
        • 3.2 Investment appraisal
        • 3.3 Working capital
        • 3.4 Budgeting
        • 3.5 Financial Accounts
        • 3.6 Ratio Analysis
  • Extended Essay
    • 01 Getting Started
    • 02 Structuring the EE
  • Writing Skills
  • Critical Reading

2.4 Macroeconomic Equilibrium

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By the end of this unit you should be able to:
  • Explain, using a diagram, the determination of short-run equilibrium, using the SRAS 
  • Examine, using diagrams, the impacts of changes in short-run equilibrium.
  • Explain why, in the monetarist/new classical approach, while there may be short-term fluctuations in output, the economy will always return to the full employment level of output in the long run.
  • ​Explain, using the Keynesian AD/AS diagram, that the economy may be in equilibrium at any level of real output where AD intersects AS.
  • Explain, using a diagram, that if the economy is in equilibrium at a level of real output below the full employment level of output, then there is a deflationary (recessionary) gap.
  • Discuss why, in contrast to the monetarist/new classical model, the economy can remain stuck in a deflationary (recessionary) gap in the Keynesian model.
  • Explain, using a diagram, that if AD increases in the vertical section of the AS curve, then there is an inflationary gap.
  • Discuss why, in contrast to the monetarist/new classical model, increases in aggregate demand in the Keynesian AD/AS model need not be inflationary, unless the economy is operating close ​to, or at, the level of full employment.

The AD/AS or aggregate demand/aggregate supply model is a macroeconomic model that explains price level and output through the relationship of aggregate demand and aggregate supply. Macroeconomic equilibrium is an economic state in an economy where the quantity of aggregate demand equals the quantity of aggregate supply. Significant changes in either aggregate demand or aggregate supply will have important effects on price, unemployment, and inflation.

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