In the short run, if AD increases, and AS doesn't change:
- the price level rises
- short run GDP rises
This is shown in the diagram below:
Causes of an increase in aggregate demand:
- An increase in consumption expenditure
- due to lower interest rates, consumers may borrow and spend
more
- consumers may spend more if they expect a price rise in the
future
- festival season consumption
- An increase in investment expenditure
- due to lower interest rates, producers may borrow to expand
their business
- producers' optimism about the future
- An increase in government expenditure
- governments may do this to stimulate the economy
- governments may undertake new projects
- An increase in exports
- due to global expansion of trade
- due to certain trade deals
- A decrease in imports
- due to self reliance, manufacturing locally
- due to trade policies of other countries