EC 202 Lecture Notes - Lecture 7: Fiscal Multiplier, George W. Bush, Procyclical And Countercyclical
Week 7
● Midterm Next Thursday, May 24th!
●Deficits, Borrowing, and Debt
○ Debt: accumulated (unpaid) deficit
○Current US debt is around 20 trillion dollars
○Should we be worried about debt?
■Many people worry about the fact that the US debt is huge, and is
growing. Why?
●It can affect ability to borrow/increase interest rate
●If we can’t borrow,we cannot pay for things
●High interest rates → lower investment/GDP
■The main thing that affects our ability to borrow in the future is how able
we are to make the interest payments.
■These interest payments depend on the current interest rates, tax rates,
and GDP growth.
■The debt will start to increase so much that eventually it will become
unsustainable
●Small forecast errors can completely change the predicted path of
debt
●Slightly higher GDP growth/lower interest rates would make the
debt a non-issue
● Fiscal Policy: changes in government spending and taxes
○One of the tools of the government to affect the economy
○Responsibility of the Congress and the President
○AD/AS Model
■Changes in spending/taxes usually affect the AD curve
■Changes in government spending directly affect the aggregate demand
■Changes in taxes change either consumption or investment by changing
disposable income
○Types of Fiscal Policy
■ Expansionary FP
●Increases AD (and hence output) in the short run
●Results from spending increases or tax cuts;
■ Contractionary FP
●Decreases AD (and therefore decreases output in the short run)
●Results from spending cuts or tax increases
○Why/when does the government pursue Expansionary/Contractionary fiscal
policy?
■Expansionary
●Typically used to overcome low economic growth (recession)
●In the past it was used to (or tried to) push output above potential
output → bad idea
■Contractionary
●Typically used to slow down economic growth when economy is
overheating
●To pay down the debt → higher taxes/lower spending → smaller
deficit (or lower surplus)
○ Countercyclical Policy: Policy that counteracts the business cycle
■Use expansionary fiscal policy when the economy is not doing well and
contractionary when it is
■Helps moderate the business cycle
○Recession, Countercyclical Policy, and the Debt
■If the government pursues countercyclical policy during recession →
increase deficit
■Expansionary policy → more spending/less taxes → larger deficits
■Is this a bad idea?
●Even if we don’t like deficits, pursuing expansionary policy during
a recession is likely a good move
●My spending is someone else’s income -- need someone to spend
to prevent downward spiral
●Pursuing a contractionary policy during recession can make
deficits larger (lower tax revenue)
○ Spending Multiplier: how many times initial spending is multiplied by.
■When government spending increases, AD increases by more than the
increase in government spending because of the ‘multiplier effect’.
■Government spends → people who receive the money spend on x →
people who receive the money for x spend it on y → people who receive
money for y spend it on z → etc
■The money spent by the government initially is spent multiple times
■The size of the multiplier depends on marginal propensity to
consume(MPC)
● MPC: what fraction of each additional dollar of income people
spend on income
MPC = change in consumption / change in income
● MPC is always between 0 and 1
SM = 1 / (1-MPC)
■Total change in spending = SM x initial change in spending
■Large MPC → larger multiplier
■Small MPC → smaller multiplier
■Multiplier also works for decreases in government spending and
increases in taxes
■Also works for changes in private spending
○ Income and MPC
Document Summary
Current us debt is around 20 trillion dollars. Many people worry about the fact that the us debt is huge, and is growing. It can affect ability to borrow/increase interest rate. If we can"t borrow,we cannot pay for things. The main thing that affects our ability to borrow in the future is how able we are to make the interest payments. These interest payments depend on the current interest rates, tax rates, and gdp growth. The debt will start to increase so much that eventually it will become unsustainable. Small forecast errors can completely change the predicted path of debt. Slightly higher gdp growth/lower interest rates would make the debt a non-issue. Fiscal policy: changes in government spending and taxes. One of the tools of the government to affect the economy. Responsibility of the congress and the president. Changes in spending/taxes usually affect the ad curve. Changes in government spending directly affect the aggregate demand.