Congratulations again. You've just been appointed economic adviser to the president of Examland. The mpe is 0.8; autonomous investment is $1,100; autonomous government spending is $8,100; autonomous consumption is $9,000; and autonomous net exports are $900. Instructions: Enter your response rounded to the nearest whole number. a. What is the equilibrium level of income in the country? Level of income: S b. Autonomous net exports increase by $1,500. What will happen to income? Incomerises by S C. You've just leamed the mpe changed from 0.8 to 0.6. How will this information change your answers in a and b? Instructions: Enter your response rounded to the nearest whole number. Level of income: S Income drops

Explanation:

(a)

mpe = 0.8

Autonomous investment = $1,100

Autonomous government spending = $8,100

Autonomous consumption = $9,000

Autonomous net exports = $900

At equilibrium,

Y = Autonomous consumption + [mpe * Y] + Autonomous government spending + Autonomous investment + Autonomous net exports

Y = 9000 + 0.8Y + 8100 + 1100 + 900

Y = 0.8Y + 19100

Y - 0.8Y = 19100

0.2Y = 19100

Y = 19100/0.2 = 95500

The level of income is $95,500.

(b)

Now, autonomous exports increases by $1,500.

mpe = 0.8

Autonomous investment = $1,100

Autonomous government spending = $8,100

Autonomous consumption = $9,000

At equilibrium,

Y = Autonomous consumption + [mpe * Y] + Autonomous government spending + Autonomous investment + Autonomous net exports

Y = 9000 + 0.8Y + 8100 + 1100 + 2,400

Y = 0.8Y + 20600

Y - 0.8Y = 20600

0.2Y = 20600

Y = 20600/0.2 = 103000

Thus,

The income rises by $7,500.

(c)

Now, mpe decreased from 0.8 to 0.6

mpe = 0.6

Autonomous investment = $1,100

Autonomous government spending = $8,100

Autonomous consumption = $9,000

Autonomous net exports = $900

At equilibrium,

Y = Autonomous consumption + [mpe * Y] + Autonomous government spending + Autonomous investment + Autonomous net exports

Y = 9000 + 0.6Y + 8100 + 1100 + 900

Y = 0.6Y + 19100

Y - 0.6Y = 19100

0.4Y = 19100

Y = 19100/0.4 = $47,750

The level of income is $47,750.

Now, autonomous exports increases by $1,500.

mpe = 0.6

Autonomous investment = $1,100

Autonomous government spending = $8,100

Autonomous consumption = $9,000

At equilibrium,

Y = Autonomous consumption + [mpe * Y] + Autonomous government spending + Autonomous investment + Autonomous net exports

Y = 9000 + 0.6Y + 8100 + 1100 + 2400

Y = 0.6Y + 20600

Y - 0.6Y = 20600

0.4Y = 20600

Y = 20600/0.4 = 51500

Thus,

The income rises by $3,750.

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