# Answer on Macroeconomics Question for Rachel

Question #12961

1. Consider the following simple model of an economy operating with fixed wages, prices, and interest rates, and excess capacity (operating below the full-employment level): where I=900

C=600+0.6Yd+I

Where C is consumption, Yd is disposable income (equal to national income, Y, in absence of a government sector), and I is investment.

a) If aggregate expenditures (AE) are a function of Y, calculate the equilibrium level of income.

b) Calculate the value of the multiplier.

C=600+0.6Yd+I

Where C is consumption, Yd is disposable income (equal to national income, Y, in absence of a government sector), and I is investment.

a) If aggregate expenditures (AE) are a function of Y, calculate the equilibrium level of income.

b) Calculate the value of the multiplier.

Expert's answer

a) AE =C+I = 600 +0.6Yd +900= 1500 +0.6Yd

b) Multiplier 1/(1-MPC)= 1/0.6=1.67

b) Multiplier 1/(1-MPC)= 1/0.6=1.67

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