OCR A-Level Economics H460
Introduction to Microeconomics
Microeconomics: The Role of Markets
Microeconomics: Business Objectives
Microeconomics: Market Structures
Microeconomics: The Labour Market
Macroeconomics: Aggregate Demand and Aggregate Supply
Macroeconomics: Economic Policy Objectives
Macroeconomics: Implementing Policy
Macroeconomics: The Global Context
Macroeconomics: The Financial Sector
Quantitative Skills for Economics
Themes in Economics: Synoptic Application
Microeconomics: The Role of Markets
Changes in demand and supply and their effects on related markets
- 3 things to know
- Component 01
Overview
Recall questions on how changes in demand and supply move price and quantity, the rationing function of price, knock-on effects in related markets, and derived demand.
What you need to know
Answer each one before you reveal it.
A poor wheat harvest raises the price of wheat. Trace the effect on the market for bread.
Supply falls while demand is unchanged. What happens to price and quantity?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Demand rises while supply is unchanged. What happens to price and quantity?
Model answer
Both the equilibrium price and the quantity traded rise.
- 2
Supply falls while demand is unchanged. What happens to price and quantity?
Model answer
The equilibrium price rises and the quantity traded falls.
- 3
Demand and supply both increase. What can be said with certainty?
Model answer
The quantity traded definitely rises, but the effect on price is indeterminate and depends on which shift is larger.
- 4
Demand and supply both fall. What is certain?
Model answer
The quantity traded definitely falls, while price may rise, fall or stay the same depending on the relative sizes of the shifts.
- 5
What is the rationing function of price?
Model answer
A higher price restricts demand to the quantity available by pricing out the consumers who value the good least.
- 6
The price of electric cars falls sharply. Trace the effect on the market for petrol cars.
Model answer
Petrol cars are substitutes, so their demand curve shifts to the left, lowering their equilibrium price and quantity.
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