What are some macroeconomic trade-offs?
What is the Short-Run Phillips Curve?
The Short-Run Phillips Curve is a graphical representation showing the inverse relationship between inflation and unemployment in the short run. It suggests that when unemployment is low, inflation tends to be high, and vice versa.
What is the basic relationship shown by the Short-Run Phillips Curve?
The Short-Run Phillips Curve shows an inverse (negative) relationship between inflation and unemployment. As unemployment decreases, inflation increases, and as unemployment increases, inflation decreases.
What does a movement along the Short-Run Phillips Curve represent?
A movement along the curve represents a trade-off between inflation and unemployment.
How does demand-pull inflation explain the Short-Run Phillips Curve?
When aggregate demand increases, firms hire more workers (lowering unemployment) and raise prices due to increased demand due to more people with disposable income to spend (causing inflation). This creates the inverse relationship: lower unemployment comes with higher inflation.
How does cost-push inflation relate to the Short-Run Phillips Curve?
When wages rise due to tight labour markets (low unemployment means firms have to raise wages to attract more workers), firms face higher production costs and pass these on as higher prices (inflation).
What happens to the economy when it moves to the left along the Short-Run Phillips Curve?
Moving to the left means unemployment is decreasing while inflation is increasing. This typically occurs during economic expansions when aggregate demand is rising.
What happens to the economy when it moves to the right along the Short-Run Phillips Curve?
Moving to the right means unemployment is increasing while inflation is decreasing. This typically occurs during economic contractions or recessions when aggregate demand is falling.
How can you illustrate the Short-Run Phillips Curve using an AS/AD diagram?
An increase in aggregate demand (AD shifts right) causes both higher price levels (inflation) and higher output (lower unemployment), showing the inverse relationship. A decrease in AD (shift left) causes lower prices and higher unemployment.
In which decade did the Short-Run Phillips Curve relationship start to break down?
The relationship started to break down in the 1970s during the period of stagflation, when both high inflation and high unemployment occurred simultaneously.
What is stagflation and how does it challenge the Phillips Curve?
Stagflation is the simultaneous occurrence of high inflation and high unemployment. This contradicts the Short-Run Phillips Curve’s prediction of an inverse relationship between the two variables.
What causes a shift in the Short-Run Phillips Curve?
Changes in inflation expectations, supply shocks increasing costs (like oil price increases), or changes in the natural rate of unemployment (increases in the NAIRU allowing for a higher unemployment rate without the risk of inflation.
What is the policy implications of the Short-Run Phillips Curve?
The curve suggests policymakers face a trade-off: they can use expansionary policy to reduce unemployment but will cause higher inflation, or use contractionary policy to reduce inflation but will cause higher unemployment.
Why might the Short-Run Phillips Curve be vertical in the long run?
In the long run, the economy returns to its natural rate of unemployment regardless of the inflation rate, making the Long-Run Phillips Curve vertical. This is because inflation expectations adjust over time.
What role do inflation expectations play in the Phillips Curve?
When workers and firms expect higher inflation, they build this into wage and price decisions, shifting the Short-Run Phillips Curve upward. This can break the traditional inverse relationship.
How does expansionary monetary policy affect the Short-Run Phillips Curve?
Expansionary monetary policy (lowering interest rates, increasing money supply) moves the economy down along the Short-Run Phillips Curve, decreasing unemployment but increasing inflation.
How does contractionary monetary policy affect the Short-Run Phillips Curve?
Contractionary monetary policy (raising interest rates, decreasing money supply) moves the economy up along the Short-Run Phillips Curve, decreasing inflation but increasing unemployment.
How does a negative supply shock affect the Phillips Curve?
A negative supply shock (like an oil price increase) shifts the Short-Run Phillips Curve to the right, causing both higher inflation and higher unemployment simultaneously (stagflation).
What is the difference between the Short-Run and Long-Run Phillips Curve?
The Short-Run Phillips Curve is downward sloping, showing an inverse relationship between inflation and unemployment. The Long-Run Phillips Curve is vertical at the natural rate of unemployment, showing no trade-off exists in the long run.
What is the Long-Run Phillips Curve (LRPC)?
The Long-Run Phillips Curve is a vertical line at the natural rate of unemployment. It shows that in the long run, there is no trade-off between inflation and unemployment - the economy will always return to the natural rate of unemployment regardless of the inflation rate.
Who developed the expectations-augmented Phillips Curve?
Milton Friedman developed the expectations-augmented Phillips Curve, which explains why the Phillips Curve relationship breaks down in the long run when inflation expectations adjust.
What are the initial economic conditions at point A?
Point A represents the economy at 0% inflation, full employment, and the natural level of unemployment. This is the long-run equilibrium with stable prices and no inflation expectations.
Why does the government attempt to move from point A to point B?
The government attempts to reduce the natural level of unemployment by stimulating aggregate demand. This represents an expansionary policy designed to create more jobs and lower unemployment below its natural rate.
What must happen to real wages for unemployment to fall below the natural rate?
Real wages must increase to persuade some of the natural level unemployed to accept jobs. The increase in aggregate demand (from increased G) creates higher demand for labour, which pushes real wages up and entices workers into the labor market.