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Inflation and Expectations. Econ 102 2014 Spring. Phillips Curve. Short-run Phillips Curve: In UK Phillips in 1958 Tradeoff between percentage change in wages and unemployment rate. SR Phillips Curve.
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Inflation and Expectations Econ 102 2014 Spring
Phillips Curve • Short-run Phillips Curve: • In UK Phillips in 1958 Tradeoff between percentage change in wages and unemployment rate.
SR Phillips Curve • Wages changes usually lead to price changes hence we see a similar relationship between between percentage change in price level and Unemployment
SR Phillips Curve • What type of policy recommendations does this indicate?
SR Phillips Curve Choose either • Low inflation (high Unemp. rate) or • High inflation (low (low Unemp. rate)
SR Phillips Curve Choose either • Low inflation (high Unemp. rate) or • High inflation (low (low Unemp. rate)
What is behind this trade off? • AD policies or changes... AD P AS E3 E2 E1 Y Potential Y
Supply shock • 1973-1979 two oil price increase by OPEC countries. Cost of production increased which can be seen as the following changes, AS2 P AS AD E2 E1 Y Potential Y
Supply shock • Result is both inflation and unemployment increase. Stagnation STAGNATION Inflation
Stagflation (inflation and unemployment) • AD policies or changes... AS2 P AD AS E2 E1 Y Potential Y
Expectations • Consumer and Producers do not have static views, they look into the future and form ‘expectations’. • They form expectations about future prices, or the rate of change of prices. • In all their consumption, production and labor supply decisions they take the expected inflation rate into consideration. • What is your expected rate of inflation today for the next year in Turkey?
What happened to Phillips Curve • How do we form expectations? • Look back, from the past: Adaptive expectations. • Look at all the information and think rationally: Rational expectations
If you expect inflation? • How will the firms decide on the price of their product? • How will the workers decide for the wage Increases? • How will borrowers and lenders be affected? What happens to the AS curve?
Borrowers and lenders 2013 2014 Fusun will pay to Ahmet 108 TL P=160 Fusun borrowed from Ahmet 100 TL (if r= 8 %) If inflation rate is 60% Then P=100 Will Ahmet be happy? NO How should Ahmet be compensated?
Wages continue to increase due to higher expected inflation... P AS3 AS2 E3 AS E2 E1 AD Y Potential Y
Aggregate Demand responds withMS increases P AS3 E3 AS2 AS E2 E1 AD3 AD2 AD Y Potential Y
Short-run and Long-run Phillips Curve LONG TUN PHILIPS CURVE Inflation rate SHORT_RUN PHILLIIPS CURVE Unemployment Rate Natural Rate of U