Use an IS curve and an MP curve to derive graphically the AD curve.

Short Answer

Expert verified

The aggregate demand would show a negative relationship between price and output.

Step by step solution

01

Step 1. Introduction

An aggregate demand curve shows the total goods and services produced in an economy. It is comprised of investment, consumption expenditure, government spending, and net exports. The aggregate demand curve is generally a downward sloping line.

02

Step 2. Explanation

An investment-saving curve shows the different points at which the goods market is at equilibrium. The money preference curve shows the different points at which the money market is in equilibrium.

Suppose the nominal money supply is assumed to be constant. The price level rises which would further cause a decline in the supply of real money balances. As a result, the monetary policy curve or the LM curve would move to the left.

This leftward shift in the LM curve would cause the interest rate to increase. The increase in the price level would also cause a decline in the output level. The aggregate demand curve formed in this way would show an inverse relationship between price and output level. The different points on this AD curve would indicate the different combinations where both the goods market and the money market are in equilibrium.

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Most popular questions from this chapter

Consider an economy described by the following:

C=\(4trillionI=\)1.5trillionG=\(3.0trillionT=\)3.0trillionNX=$1.0trillionf=0mpc=0.8d=0.35x=0.15λ=0.5r=2

(a) Derive expressions for the MP curve and the AD curve.

(b) Calculate the real interest rate and aggregate output whenπ=2andπ=4

(c) Draw a graph of the MP curve and the AD curve, labeling the points given in part (b).

Assume that the monetary policy curve is given by

r = 1.5 + 0.75p.

a. Calculate the real interest rate when the inflation rate

is 2%, 3%, and 4%.

b. Draw a graph of the MP curve, labeling the points

from part (a).

c. Assume now that the monetary policy curve is given

by r = 2.5 + 0.75p. Does the new monetary policy

curve represent an autonomous tightening or loosening

of monetary policy?

d. Calculate the real interest rate when the inflation rate

is 2%, 3%, and 4%, and draw the new MP curve,

showing the shift from part (b).

A measure of real interest rates can be approximated by the Treasury Inflation-Indexed Security, or TIIS. Go to the St. Louis Federal Reserve FRED database, and find data on the five-year TIIS (FII5) and the personal consumption expenditure price index

(PCECTPI), a measure of the price index. Choose “Quarterly” for the frequency setting for the TIIS, and choose “Percent Change From Year Ago” for the unitssetting on (PCECTPI). Plot both series on the samegraph, using data from 2007 through the most currentdata available. Use the graph to identify periods of autonomous monetary policy changes. Briefly explain your reasoning.

Why does the MP curve necessarily have an upward slope?

Ifλ=0,what does this imply about the relationship between the nominal interest rate and the inflation rate?

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