Edexcel A-Level Economics B 9EB0
Scarcity, Choice and Potential Conflicts
Enterprise, Business and the Economy
Introducing the Market
The Role of Credit in the Economy
Market Failure and Government Intervention
Revenue, Costs, Profits and Cash
Business Growth and Competitive Advantage
Firms, Consumers and Elasticities of Demand
Productive Efficiency
Life in a Global Economy
The Economic Cycle
Introduction to Macroeconomic Policy
Globalisation
Economic Factors in Business Expansion
Impact of Globalisation on Global Companies
Impact of Globalisation on Local and National Economies
Global Labour Markets
Inequality and Re-Distribution
Competition and Market Power
Market Power and Market Failure
Market Failure Across the Economy
Macroeconomic Policies and Impact on Firms and Individuals
Risk and the Financial Sector
Introducing the Market
Movements along and shifts of the demand curve
- 3 things to know
- Papers 1 and 3
Overview
Movements along against shifts of the demand curve, extensions and contractions of demand, substitutes and complements, normal and inferior goods, and how real incomes, advertising, an ageing population and a health scare shift demand, but a good's own price never does.
What you need to know
Answer each one before you reveal it.
Distinguish between a movement along a demand curve and a shift of the curve.
What is an extension of demand?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Distinguish between a movement along a demand curve and a shift of the curve.
Model answer
A movement along the curve is caused only by a change in the good's own price, while a shift is caused by a change in any other determinant of demand.
- 2
What is an extension of demand?
Model answer
An extension of demand is a rise in quantity demanded caused by a fall in the good's own price, shown as a movement down the curve.
- 3
What is a contraction of demand?
Model answer
A contraction of demand is a fall in quantity demanded caused by a rise in the good's own price, shown as a movement up the curve.
- 4
In which direction does an increase in demand shift the curve?
Model answer
An increase in demand shifts the curve to the right, so a greater quantity is demanded at every price.
- 5
What is a substitute good?
Model answer
A substitute is a good that can be used in place of another, so a fall in the price of one reduces demand for the other.
- 6
The price of coffee falls sharply. Explain what happens to the demand curve for tea.
Model answer
The demand curve for tea shifts to the left, because consumers switch towards the cheaper substitute.
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