Shifts of the Demand Curve
- There are numerous factors that will change the demand for a good/service, irrespective of the price level. Collectively these factors are called the conditions of demand
- Changes to each of the conditions of demand, shifts the entire demand curve (as opposed to a movement along the demand curve)
A graph that shows how changes to any of the conditions of demand shifts the entire demand curve left or right, irrespective of the price level
- For example, if a firm increases their Instagram advertising, there will be an increase in demand as more consumers become aware of the product
- This is a shift in demand from D to D1. The price remains unchanged at £7 but the demand has increased from 15 to 25 units
- This is a shift in demand from D to D1. The price remains unchanged at £7 but the demand has increased from 15 to 25 units
An Explanation of How Each of the Conditions of Demand Shifts the Entire Demand
Curve at Every Price Level
Condition |
|
Condition |
Shift |
Condition |
Shift |
Changes in Real Income |
|
Income |
D Increases |
Income |
D Decreases |
Changes in taste/fashion |
|
Good becomes more fashionable |
D Increases |
Good becomes less fashionable |
D Decreases |
Advertising/ |
|
Advertising Increases |
D Increases |
Advertising Decreases |
D Decreases |
Changes in the prices of substitute goods |
|
Price of Good A Increases |
D for |
Price of Good A Decreases |
D for |
Changes in the prices of complementary goods |
|
Price of Good A Increases |
D for |
Price of Good A Decreases |
D for |
Changes in population size/distribution |
|
Population Increases |
D Increases |
Population Decreases |
D Decreases |
Exam Tip
The difference between a movement along the demand curve and a shift in demand is essential to understand. You will be repeatedly examined on this and it is important that you use the correct language to show that you understand the difference between a change in quantity demanded and a change in demand.
When price changes (ceteris paribus), there is a movement along the demand curve resulting in a change to quantity demanded. When a condition of demand changes, there is a shift of the entire demand curve resulting in a change to demand.