Aggregate Demand
The demand for every product by everyone in the U.S.
AD = GDP = C + I + G + Xn
Aggregate Demand Curve
3 Reasons why Aggregate Demand is downward sloping
Wealth Effect
as the price level goes up, the value of people’s assets goes down (GDP demanded goes down)
Interest Rate Effect
Occurs when a change in the price level leads to a change in interest rates and therefore a change in the quantity of aggregate demand.
Foreign Trade Effect
When the U.S. price level rises, foreign buyers purchase fewer U.S. goods and americans buy more foreign goods.
Exports fall and imports rise causing real GDP demanded to fall (Xn decreases)
Shifters of AD
Change in Consumer Spending
Changes in Investment Spending
Changes in Government Spending
Government expenditures either increase or decrease the AD
Change in Net Exports
Aggregate Supply
The supply of everything by all firms; Aggregate supply differentiates between short run and long run and has two different curves.
Short Run Aggregate Supply
Resembles typical supply curve (curves up to the sky) with Price Level (PL) on the Y-axis and Real GDP (GDPr) on the X-axis. Curves upward because in the short run, wages and resource prices stay the same as price levels increase, and real profits increase providing businesses with incentive to increase production.
Long Run Aggregate Supply Curve
Vertical line on graph; This is because in the long run, wages and resource prices are flexible and will increase as price levels increase (bc workers will demand higher wages to match the increase in prices) causing nominal profits to apparently increase and real profits to stay the same. If the real profit doesn’t change, the firm has no incentive to increase output.
Shifters of (SR) Aggregate Supply
RAP!
Change in Resource Prices
Changes in Actions of the Government
Changes in Productivity
Classical economic theory
with no government involvement, wages will rise/fall which shifts aggregate supply and brings the economy back to full employment.
Keynesian economic theory
the government should raise/lower government spending and income taxes to shift aggregate demand and bring economy back to full employment
Discretionary fiscal policy
congress creates a new law that is designed to change aggregate demand through spending and taxation
Non-discretionary fiscal policy
(aka automatic stabilizers) permanent spending/taxation enacted to work counter to cyclical and stabilize the economy.
Expansionary fiscal policy
laws designed to reduce unemployment and increase GDP (close recessionary gap)
Contractionary fiscal policy
laws designed to reduce inflation and decrease GDP (close inflationary gap)