3. Suppose equilibrium GDP is 10,000 and the MPC = .6.
a. What effect will a $1,000 increase in planned investment have on GDP?
b. What effect will a $1,000 increase in planned investment have on consumption? (Hint; remember that consumption and income are related).
a.
Multiplier = 1 / 1 - MPC = 1 / 0.4 = 2.5
Multiplier, m = Y / I
2.5 = Y / 1000
Y = 2,500
So, the GDP will increase by $2,500
b
We know that, C = MPC*Y
C = 0.6*2,500
C = 1,500
So, the consumption will increase by $1,500
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