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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

1.2 Elasticities

What we will study?

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PRICE ELASTICITY OF DEMAND 
  • What is price elasticity of demand?
  • Calculating price elasticity of demand
  • Interpreting the value of price elasticity of demand
  • PED changes at different points on the demand curve
  • Determinants of price elasticity of demand
  • Price elasticity of demand and total revenue
  • Price elasticity of demand and sales taxes

​CROSS-PRICE ELASTICITY OF DEMAND  
  • Calculating cross-price elasticity of demand (XED)
  • Interpreting XED values
  • Applications of XED

INCOME ELASTICITY OF DEMAND 
  • Calculating income elasticity of demand (YED)
  • Interpreting YED values
  • YED and industry expansion
  • YED and sectors of the economy
  • YED and the business cycle

PRICE ELASTICITY OF SUPPLY 
  • Calculating price elasticity of supply (PES)
  • Interpreting PES values
  • Determinants of PES
  • Applications of PES

Introduction to Elasticities

Elasticity is an economic concept which refers to the responsiveness among consumers or producers to a change in a variable which affects either the market demand or the market supply.
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There are four types of elasticity that we will study in this unit:
​
• Price Elasticity of Demand (PED): Measures the responsiveness of consumers of a particular good to a change in the good’s price.
• Cross-price elasticity of Demand (XED): Measures the responsiveness of consumers of one good to a change in the price of a related goo (either a substitute or a complement).
• Income Elascity of Demand (YED): Measures the responsiveness of consumers of a particular good to a change in their income.
• Price elasticity of Supply (PES): Measures the responsiveness of producers of a particular good to a change in the price of that good.
 

Price Elasticity of Demand

Cross Elasticity of Demand

Income Elasticity of Demand

Price Elasticity of Supply