1. LESSON 6.2 Shifts of Demand and Supply Curves
CONTEMPORARY ECONOMICS
Objectives
LESSON 6.2 Shifts of Demand and Supply Curves
Explain how a shift of the demand curve affects equilibrium price and quantity.
Explain how a shift of the supply curve affects equilibrium price and quantity.
Explain what happens to equilibrium price and quantity if both curves shift.
CONTEMPORARY ECONOMICS: LESSON 6.2
LESSON 6.2

2. LESSON 6.2 Shifts of Demand and Supply Curves
Key Terms
LESSON 6.2 Shifts of Demand and Supply Curves
increase in demand
decrease in demand
increase in supply
decrease in supply
CONTEMPORARY ECONOMICS: LESSON 6.2

3. Shifts of the Demand Curve
A shift of the demand curve means that quantity demanded changes at each price.
CONTEMPORARY ECONOMICS: LESSON 6.2

4. What Could Shift the Demand Curve?
An increase in the money income of consumers
An increase in the price of a substitute
A change in expectations
A growth in the population of consumers
A change in consumer tastes
CONTEMPORARY ECONOMICS: LESSON 6.2

5. An Increase in Demand
An increase in demand means that consumers are now more willing and able to buy the product at every price.
CONTEMPORARY ECONOMICS: LESSON 6.2

6. A Decrease in Demand
A decrease in demand means that consumers are less willing and able to buy the product at every price.
CONTEMPORARY ECONOMICS: LESSON 6.2

7. Summary of Demand Shifts
If the demand curve shifts rightward, price and quantity increase.
If the demand curve shifts leftward, price and quantity decrease.
CONTEMPORARY ECONOMICS: LESSON 6.2

8. Shifts of the Supply Curve
A shift of the supply curve means that quantity supplied changes at each price.
CONTEMPORARY ECONOMICS: LESSON 6.2

9. What Could Shift the Supply Curve?
A reduction in the price of a resource
A decline in the price of another good these resources could make
A technological breakthrough
A change in expectations
CONTEMPORARY ECONOMICS: LESSON 6.2

10. An Increase in Supply
An increase in supply means that producers are more willing and able to supply pizza at every price.
CONTEMPORARY ECONOMICS: LESSON 6.2

11. A Decrease in Supply
A decrease in supply means that producers are less willing and able to supply the product at every price.
CONTEMPORARY ECONOMICS: LESSON 6.2

12. Summary of Supply Shifts
If the supply curve shifts rightward, price decreases but quantity increases.
If supply shifts to the left, price increases but quantity decreases.
CONTEMPORARY ECONOMICS: LESSON 6.2

13. Both Curves Shift Curves shift in the same direction
Equilibrium quantity will increase.
What happens to price depends on which curve shifts more.
Curves shift in opposite directions
Equilibrium price will increase if demand increases and supply decreases.
Equilibrium price will decrease if demand decreases and supply increases.
CONTEMPORARY ECONOMICS: LESSON 6.2

14. Change in Demand Change in Supply Decreases Decrease Increases
Equilibrium price change is indeterminate.
Equilibrium quantity increases.
Equilibrium price falls.
Equilibrium quantity change is indeterminate.
Equilibrium price rises.
Equilibrium quantity change is indeterminate.
Equilibrium price change is indeterminate.
Equilibrium quantity decreases.
CONTEMPORARY ECONOMICS: LESSON 6.2