Principles of Macroeconomics (MindTap Course List)
7th Edition
ISBN:9781285165912
Author:N. Gregory Mankiw
Publisher:N. Gregory Mankiw
Chapter22: The Short-Run Trade-off Between Inflation And Unemployment
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3 Potential output growth and inflation
In this question, we will see how policymakers' beliefs about long run growth
can affect the economy. Remember the two ways of writing the IS curve, and
the Phillips curve:
IS curve (output): Y; = (ā+1)Y, – bY :(rt – F)
IS curve (output gap): = à – b(rı – F)
Phillips curve: T = Tp-1 + vý.
You can assume that in period T-1, the output gap and inflation are both zero
and the real interest rate is r; = r.
1. Suppose growth in actual output Y, is slowing down. Policymakers believe
this is occurring because of a negative shock to aggregate demand (a neg-
ative shock to a). Using an IS-MP diagram with the output gap on the
horizontal axis, show how such a shock would account for the slowdown.
2. Suppose that policymakers want to make sure the output gap in period T
is 0. Using the same IS-MP diagram, show what monetary policy action
they will take.
Transcribed Image Text:3 Potential output growth and inflation In this question, we will see how policymakers' beliefs about long run growth can affect the economy. Remember the two ways of writing the IS curve, and the Phillips curve: IS curve (output): Y; = (ā+1)Y, – bY :(rt – F) IS curve (output gap): = à – b(rı – F) Phillips curve: T = Tp-1 + vý. You can assume that in period T-1, the output gap and inflation are both zero and the real interest rate is r; = r. 1. Suppose growth in actual output Y, is slowing down. Policymakers believe this is occurring because of a negative shock to aggregate demand (a neg- ative shock to a). Using an IS-MP diagram with the output gap on the horizontal axis, show how such a shock would account for the slowdown. 2. Suppose that policymakers want to make sure the output gap in period T is 0. Using the same IS-MP diagram, show what monetary policy action they will take.
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