Fiscal policy refers to government decisions about the level of taxation or government spending.
It affects the economy by influencing aggregate demand (AD).
Changes in government spending (G) directly impact AD.
Expenditure multiplier
Taxes (T) directly affect consumption, which impacts AD.
Tax multiplier
Fiscal Policy and Aggregate Demand (AD)
Expansionary fiscal policy
Example: Suppose MPC = 0.75
Change in G? (Increase)
Change in T? (Decrease)
Contractionary fiscal policy
Example: Y = 80 billion, Yp = 60 billion, and MPC = 0.8
Change in G? (Decrease)
Change in T? (Increase)
Expansionary fiscal policy shifts the AD curve to the right.
Output increases.
Prices increase.
Graph:
Initial equilibrium: AD1, SRAS, LRAS intersect at Y1 and P1. Y1 > YP.
Expansionary policy shifts AD1 to AD2, new equilibrium at YP and P2.
Y1 = 80 billion. YP = 60 billion.
Fiscal Policy and AD (continued)
Why does the government engage in fiscal policy if the economy corrects itself?
To smooth fluctuations in the economy.
Transition from SR to LR can be a slow (and painful!) process.
Correcting the economy can be difficult
"Crowding out" or "crowding in" is possible. These terms weren't defined in the lecture, but "crowding out" typically refers to when government borrowing increases interest rates and reduces private investment. "Crowding in" refers to when government spending stimulates private sector activity.
How large should the policy be? How to implement it?
Time lags can make policy ineffective or harmful
Information lag: recognizing the problem.
Formulation lag: deciding on and passing legislation.
Implementation lag: time it takes for the policy to take effect.
Fiscal Policy and AD (continued)
Automatic stabilizers: Changes in T and G that automatically change with economic conditions (i.e., without specific action from policymakers).
Taxes
The income tax system is progressive and based on income level.
Some government spending
Where eligibility criteria are based on income or unemployment status