MACROECONOMICS
MACROECONOMICS
14th Edition
ISBN: 9781337794985
Author: Baumol
Publisher: CENGAGE L
Question
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Chapter 6, Problem 1TY
To determine

Difference between the growth rate of GDP among countries A and B.

Expert Solution & Answer
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Explanation of Solution

GDP measures the value of all final goods and services produced by an economy in an accounting year.

It is given that the economy of countries A and B grow at an annual rate of 3 percent and 4 percent respectively. And the two countries start with a similar GDP.

The growth rate after 25 years can be calculated using the following formula-

  FV=PV(1 + rate of growth)t(1)

Here,

FV represents the future value of the growth rate of GDP

PV represents the present value of GDP

t represents the total number of years

Assuming, the GDP of both countries equal to $10 at the initial stage. Plug the given values in (1) to determine the value of the GDP of both the countries after 25 years.

Country A

  FV=10(1+0.03)25=10(1.03)25=10(2.094)=20.94

Thus, the future value of country A's GDP is equal to $20.094.

Country B

  FV=10(1+0.04)25=10(1.04)25=10(2.665)=26.65

Thus, the future value of country B's GDP is equal to $26.65.

After 25 years, country B's economy is larger than country A by the following proportion,

  ( FuturevalueofGDPofcountryB FuturevalueofGDPofcountryA)-1( 26.65 20.94)-1=1.27-1=0.27

Thus, country B's economy is approximately 27% higher than country A. The answer is not 25% because the rate at which the economy is growing is compounding.

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