Macroeconomics: Spring Term Flashcards
What does the Phillips curve show?
A negative relationship between inflation and unemployment
low unemployment with a high inflation
What is the Phillips Curve equation?
π = (πe) + (µ + z) - αu
Walkthrough the elements of the Phillips curve…
Increase in inflation is caused by
- Increase in expected inflation
- Increase wage determination variables
- Fall in unemployment
What assumption does the original Phillips curve make?
That expected inflation is equal to 0
What is the wage-price spiral?
Low unemployment increases wages. Prices increase, workers ask for more wages, price increase… etc!
Why did the negative relation between unemployment and inflation vanish in the 1970s? (Phillips curve)
- Increase in oil prices
- Expectations for wages changed as inflation became consistently positive and persistent
When expectations of inflation (0=1), what does the unemployment rate impact?
The CHANGE in inflation rate
Equation for expectations-augmented Phillips curve?
(πt)-(πt-1) =(µ + z)-α(ut)
What is the natural rate of unemployment?
The unemployment rate when the actual inflation rate is equal to the expected inflation rate
What is the Phillips curve equation including the natural rate of unemployment?
πt - (πt-1)= -α(ut- un)
What is the non-accelerating inflation rate of unemployment?
Rate of unemployment required to keep the inflation rate constant
What happens to inflation when the unemployment rate exceeds the natural
rate of unemployment, t
It decreases
Do all countries have the same level of natural unemployment?
No, as the factors that affect it differ across countries
What explains the level of European unemployment?
Labour Market Rigidities
- A generous system of unemployment insurance
- A high degree of employment protection
- Minimum wages
- Bargaining rules
What is wage indexation?
A rule that increases wages in line with inflation
A higher proportion of wage contracts being indexed leads to what effect?
More indexed contracts, means the larger the effect of the unemployment rate on the change in inflation.
When λ is closer to 1, small changes in unemployment can lead
to very large changes in inflation
What happens to the Phillips Curve when inflation is close to 0?
The relation may disappear at these low levels (e.g. depression didn’t cause deflation)
What is Okun’s law?
Change in unemployment rate should be equal to the negative of the growth rate of output
What is the normal growth rate?
The level which keeps the unemployment rate constant (3%)
Why does output growth at 1% above normal only reduce unemployment by 0.4% in reality?
- Labour hoarding, firms would rather keep workers than sack them
- When employment increases not all new jobs are filled by the unemployed (0.6 : 0.4)
What does the coefficient in Okun’s law represent?
Gives the effect on the unemployment
rate of deviations of output growth from normal.
What effect does an increase in the real money stock have on output?
Decreases the interest rate, increases demand for goods and increases output
Difference between nominal and real interest rates?
Nominal: Expressed in the unit of national currency
Real: Expressed in terms of a basket of goods
The real interest rate is approx equal to…? (when the rates aren’t too large)
Nominal interest rate minus the expected rate of inflation
Which interest rate is affected by monetary policy?
Nominal rate
Which interest rate affects spending and output?
The real interest rate
What is adjusted nominal money growth?
Nominal money growth minus normal output growth which is equal to inflation
What is the Fisher effect?
The nominal interest rate increases 1:1 with inflation in the medium run
The central bank decides to decrease nominal money growth. What will happen in
the short run?
Leads to lower real nominal money growth and a decrease in output growth- if this is below normal it increases unemployment (Okun).
-Unemployment above natural level, decreases inflation (Phillips curve)
Lower money growth has what effect in the the medium run?
- Lowers nominal interest rate
- No effect on real interest rate
What is a point-year of excess unemployment?
Difference
between the actual and the natural unemployment rate
of one percentage point for one year
What is the sacrifice ratio?
The number of point-years of
excess unemployment needed to achieve a
decrease in inflation of 1%.
What does the Lucas critique state?
it is unrealistic to
assume that wage setters would not consider
changes in policy when forming their expectation
What did Sargent argue about disinflation?
It would only occur with small increases in unemployment. Essential that wage setters think the CB is committed to disinflation
Why did Fischer argue wages didn’t account for policy?
Many wages are set before policy changes- nominal rigidities. Even with credibility, too
rapid a decrease in nominal money growth would
lead to higher unemployment
Why did Taylor suggest disinflation should be phased in slowly?
To avoid an increase in unemployment, as wage contracts are staggered.
How is the real exchange rate calculated?
(Nominal exchange rate x price)/ Foreign price level
How can the real exchange rate adjust?
- Change in nominal exchange rate
- Change in domestic price level relative to foreign prices
How does the price affect output in an open economy with fixed exchange rates?
The price level affects output through its effect on the real exchange rate (higher prices, leads to appreciation and lower output)
How does the price affect output in a closed economy with fixed exchange rates?
The price level affects output through its effect on the real money stock, and in turn, its effect on the interest rate.
What happens when output is lower than the natural level?
Price level decreases, leading to steady real depreciation
In the medium run how does a fixed nominal exchange affect the real rate?
A fixed nominal rate is consistent with an adjustment of the real exchange rate through movements in the price level
How does a devaluation (decrease in nominal exchange rate) affect output?
The devaluation leads to a real depreciation (a decrease in the real exchange rate)
and, therefore, to an increase in output
Why is it too good to be true that a devaluation can return output to its natural level?
- Effects do not happen right away
- Direct effect of the devaluation on prices usually
What is the interest parity condition?
Under fixed exchange rates if markets think this will hold the domestic and `foreign interest rates will be equal
What can be done in an exchange rate crisis (fixed rates)?
- Try to convince there won’t be a devaluation
- Increase the interest rate
- Eventually CB must raise interest rates or devalue
Arguments against fixed exchange rates?
- Lose control of interest and exchange rate
- Expected devaluations push up interest rates
Arguments against flexible exchange rates?
Move a lot, and can be difficult to control through monetary policy
When are flexible exchange rates not preferable?
-If the CB is not trusted to follow responsible policy.
-If a group of countries are already tightly
integrated, a common currency may be the right solution
What is a hard peg?
The symbolic or technical mechanism by which a country plans to maintain exchange rate parity e.g. dollarisation
Problems with a currency board?
- Forced to resist demand for credit from gov and business
- Lack of an independent monetary policy.
- Strict fiscal policy rules to maintain the peg.
Conditions required for countries to classify as an optimal currency area?
- Similar shocks (therefore can use similar monetary policy)
- High factor mobility, adjust for shocks
What is growth?
Growth is the steady increase in aggregate
output over time
Why do we care about growth?
It is connected to the standard of living- we want to examine the growth rate per person
Problems with looking at GDP converted into dollars?
- Exchange rates vary
- Doesn’t account for lower prices of food and basic services in the country
What is GDP adjusted for purchasing power parity?
We calculate GDP using a common set of prices for all countries
What are international dollar prices?
The prices used to calculate Purchasing power parity
Trends in growth for rich countries since 1950?
-Large increase in output per person.
-Convergence of output per person
across countries
Is there a relationship between growth of output and output per person globally since 1960?
No clear relationship
What countries are the 4 tigers?
Convergence is apparent in Asia. (4% growth rates) Singapore,
Taiwan, Hong Kong and South Korea started catching up to the high
output of Japan
What are emerging economies?
Economies with high growth rates but low output per
person
Where is convergence not the rule?
Africa
Growth from end of Roman empire to 1500 approx was?
No growth of output per person in Europe
Growth rates from 1500-1700 and 1700 to 1820?
0.1% per year. It increased to 0.2% per year from 1700 to 1820.
What is a Malthusian trap?
A period where countries are unable to increase their output per person
What is the aggregate production function?
The output produced for given quantities of capital and labour
What is a state of technology?
A set of blueprints defining the range of products and the techniques available to produce them
What are decreasing returns to capital?
The property that increases in capital lead to smaller and smaller increases in output as the level of capital increases
What are decreasing returns to labour?
property that increases
in labour, given capital, lead to smaller and smaller increases in
output as the level of labour increases
What can cause increases in output per worker?
Increases in capital per worker OR
Improvement in the state of technology that shift the production function
What causes sustained growth?
Tech progress which shifts the production function up (capital accumulation cannot sustain growth)
Why has the income per capita in Europe decreased since the 1970s relative to the USA?
- Few people work;
- Those who work work few hours
- Those who work, when they do, produce little
Relationship between capital and output cycle?
Amount of capital determines the output/income which determines the saving/investment rate and in time the capital accumulation