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73 Cards in this Set

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In IS-LM model, what is assumed in regards to prices?
Sticky prices
what is the government purchase multiplies:
How much income increases with a change in $1 gov't purchase. so Delta G* (1/1-MPC)
What is the tax multiplier?
How much income increase with a change in $1 Tax so delta &/Delta T=

-MPC/(1-MPC)
what graph consists of the theory of liquidity Preference?
LM curve in IS model
what is better in the LR? Keynesian or Classical?
Classical..output constant. Keynesian is better in the SR when Y can move put prices are cnst
In regards to the great depression, what is spending hypothesis
Shocks to the IS curve...said GD due to exogenous fall in spending on goods and services.
May be due to
-Stock market crash
-Decrease in consumption
-decrease in housing
-Bank failure
In regards to the Great Depression, what is the money hypothesis
Main blame for GD is the Fed for not allowing M to drop so much
What is problems with the money hypothesis in terms of the great depression?
1. real money balance didn’t always fall since M and P dropped together. Can’t explain the initial downturn in 1929-1931
2. Behavior of interest shift…if LM curve shift, we should have seen higher r, but that didn’t happen. Nominal fell continuously.
What is the Pigou effect?
Said that real money balances are part of household's wealth. As p falls, M/P increase and consumers should feel wealthier, and cause an expansionary shift in the IS curve...idea of the 1930s that is false.
In explaining how fall in prices could depress income, what is the debt-deflation theory?
: Describes the effects of unexpected falls in price level
-Unanticipated changes in p redistribute wealth from debtor and creditor.
If p fall, then things are actually cheaper, but debtor pays more. Real debt is debt/P. So decrease in p raises the amount of debt. So good for creditors, bad for debtors

-Affects spending on goods and services
-debtor spend less, creditor spend more.
Since debtor, we assume has higher propensities to consume than creditor, there is net reduction in spending, shift in the IS and lower income.
How does expected inflation affect income?
If expected inflation is negative, that people believe price will fall, then r will be bigger than nominal. this increases decreases PE and IS shift down.
When do you use Mundell Fleming Model?
like the IS-LM so fixed prices BUT for Open economy..and assumes that economy is open with perfect capital movement
Exchange rate vs real exchange rate formula
E=eP/P*...but prices are fixed in MF model, so E=e
Engodenous vs exogenous variable
endogenous: Variable explained by a particular model (X and Y axis)
Exogenous: Variable the model takes as a given. Variable whose value is independent of the model's solution.
floating exchange rates:
: exchange rate is set by market forces and is allowed to fluctuate in response to changing economic conditions
fixed exchange rate
Central bank announces the value for the exchange rate and stands ready to buy and sell the domestic currency to keep exchange rate at the announced level.
WHen does the nominal exchange rate affect the model?
Only in the SR for the prices are fixed.
If a country has a gold standard, what does that mean?
that exchange rates are fixed.
What is devaluation. When would a country do that
Reduction of value of currency is devaluation...when in fixed exchange rate, devaluation would lead to an increase in aggregate income
What is revaluation by a central bank in terms of exchange rate When would they want to do that
increase in fixed exchange rate. decrease Nx and lowers Aggregate income
How is Nx, S, and I related?
NX=S-I
What is Law of one price
assumed that interest in small is determined by world interest rate
If domestic r is above world, people will invest in domestic, and increase demand of domestic currency, and drive Nx down.
Why this doesn’t always apply
1. country risk--> some countries are riskier
2. expected changes in exchange rate
when e decreases, what does it show it terms of buying power
decreases, so depreciates the currency
in r+pheta example, increaase in pheta hypothetically increase r. and increases Y but that does not happen...why?
-central bank may not want such a large depreciation of currency so may decrease M.
-depreciated of domestic currency may increase the price of imported goods, causing and increase in price level.
-Though risk premium increase, residents may respond by increasing their demand fr money…

So increase in risk not desirable…and Y would probably decrease as well.
Pro of floating exchange rate
-allow monetary policy used for other purposes
Fixed: monetary is committed to maintain exchange rate at announced level
Pro of fixed exchange rate
Say a pro of exchange rate is helps facilitate trade between countries.
Also discipline a nations’s monetary authority and excessive growth in money supply…
Speculative attack
speculation cause people to go to the bank and sell all their dollars→cause the dollars to dwindle and pesos do indeed lose value
To avoid speculative attacks, economists argue that a fixed exchange rate should be supported by a currency board.
Currency board is...
arrangemnt by which central bank holds enough foreign currency to back each unit of domestic currency.
→every peso, carry a dollar.
Dollarization:
Currency board's next natural step abandon own currency and let the country use the US dollar.
-happens often in high inflation econonomies.
If a country really wants tits currency to be fixed oto the dollar, most reliable is to make the currency the dollar.
con of dollarization
reliable but the seigniorage revenue the government gives up...US govt gets revenue that is generated by growth in money supply.
what is the impossible trinity
IT is impossible to have free capital flows, a fixed exchange rate, and independent monetary policy
So US has FCF and IMP but no FER (exchange rate volatility)
Hong Kong has FCF, FER but no IMP (no monetary policy for stabilization)
China has IMP and FER but no FCF (Restrict citizens from participating in world financial market)
So US has FCF and IMP but no FER (exchange rate volatility)
Hong Kong has FCF, FER but no IMP (no monetary policy for stabilization)
China has IMP and FER but no FCF (Restrict citizens from participating in world financial market)
IS-LM explains AD in ____ economy
Mundell Flemming explains AD in ____economy.
Closed; open
what shifts AD?
anything that changes Y with exception of P.
what is the Phillips Curve
the tradeoff between inflation and unemployment.
AS market models:
1. imperfect info model
2. sticky price model
What is AS equation in the SR?
Y=Ybar+a(P-EP)
so Y is not Ybar when EP deviates from P.
a in this cause is how much output responds to unexpected changes in price level and 1/a is the slope
Sticky price model
most widely accepted explanation for upward sloping SR AS curve...emphasizes that firms don't instantly adjust prices they change in response to changes in demand...
-don't want to annoy customers
-have contracts
-may be based to sticky wage
A firm's desired price of p is dependent on 2 macroecon variables which are:
1. overall prices P: higher price level=firm's costs are higher=charge more for product
2. Level of Aggregate income Y. Higher Y raises demand for the firm's product.
What is the equation for the firm's desired price? for flexible AND sticky?
desired price p=P+a(Y-Ybar)=for flexible firms...

sticky price firms: p=EP
What is sticky price model say AS is associated with?
overall price level is dependent on expected price and level of output. Y changes from Y bar when there is a change from EP and P/
What is Imperfect info model
Prices are free to adjust and balance supply and demand. In this model, SR and LR differ because of temporary misperceptions about prices--> each produce one good and consume many good. can't take all info in. So they confuse change in price with relative price and overall level of price change...-->cause upward slope.
what does the imperfect info model tell us with output and price?
that change in output occurs when people's expected price are under actual prices, suppliers raise their output.
what is adaptive expectations:
People form their expectations of inflation based on recently observed inflation
what is cyclical unemployment
u-un ( for the Phillips Curve)
in terms of the Phillips curve, what is demand-pull inflation?
low unemployment pulls the inflation rate up.
In terms of the phillips curve, what is cost-push inflation?
adverse suply shocks are typically events that push up the costs of production. If costs of production go up, there will be more inflation
In terms of the phillips curve, policy makers can change what to change the inflation rate?
they can change aggregate demand,and supply shocks are out of their control
what is NAIRU
natrual acceleration inflation rate of unemployment--> natural rate of unemployemnt when expected inflation equals previous year's inflation, so there will be a constant rise in price level due to past inflation influences expetations of future.
What is the sacrrifice ratio?
percentage of year's real GDP that must be forgone to reduce inflation by 1 percentage point
What is Okun's law?
That change in 1 percent unemployment is change in 2 percentage of GDP
how do people think about inflation?
Rational expectation vs. Adaptive expectation
What is rational expectation:
people optimally use all the available info including current government policies to forecast the future. so a change in monetary or fiscal policy will change expectations..so there is no momentum..so sacrifice ratio is not uselful...
what does a painless disinflation, under rational expectation require?
1. plan must be announced before the owrkers and firms that set wages and prices have formeed their expectations.
2. workers and firms must believe the announcement
what is the natural rate hypothesis?
change in the AD affect u and Y only in the short run. LR...econonomy returns to natural levels of Y and u
Hysteresis:
Long lasting effects of history on the natural rate and goes against natural rate hypothesis
ex: people lose job, and lose skills.-->so increases the cost of recessions and may increase sacrifice ratios
inside lag:
time between shock to the economy and policy action in respond to that shock...sometimes due to policy makers unaware of shock. short inside lag is monetary
Outside lag:
time between a policy action and influence on economy-->do not immediately influence spending, income and employment. fiscal policies have a short outside lag.
What is automatic stabilizers
not active or passive, but designed to reduce lags associaated with stabilization policy. example: income taxes
leading indicator in terms of economic forecasting:
data series that fluctuates in advance of the economy...so keys to show if a recession will happen etc.
Lucas critique:
Critique on traditional policy evaluation, that they do not adequately take into account the impact of policy on expectations.
what is policy by rule?
if policy makers announce in advance how policy will respond to various situations and commit themselves to following through on the announcement
what is policy by discretion
policy makers are free to size up events as they occur and choose whatever they think is approproate at the time.
What is political business cycle
manipulation of the economy for electoral gain.
Time inconsistency of policy ad rule by discretion
Policy makers may want to announce in advance a policy to influence expectations of private decision makers. may be tempeted to change their policy which lead to distrust.
what are rules of policy for monetary?
1. monetarists policy
2. nominal GDP targeting
3. inflation targeting
What is monetarist policy ?
Fed keep the money supply growing at a steady rate.
What is nomminal GDP targetting
Fed announces a planed path for nominal GDP and controls money growth for that GDP.
What is inflation targeting
Fed announce target inflation rate and adjust money supply. both nominal GDP targeting and inflation targeting is more stability that monetarist policy for it insulates economy from changes in velocity
what are ways that economists try to forecast?
macro models and leading indicators
what is the equation of unemployment with natural unemployment
u=un-a(Inflation-Expected inflation)
theory of liquidity preference
theory of interest rate and so the relationshp between intereest rate and income