Class 12 > Previous Year Questions

Question

Measure the level of ex-ante aggregate demand when autonomous investment and consumption expenditure (A) is Rs 50 crores, and MPS is 0.2 and level of income (Y) is Rs 4000 crores. State whether the economy is in equilibrium or not (cite reasons).
Easy

Solution

As given in the examination problem, Equilibrium Income (Y) = Rs 4000 crore Autonomous Investment + Autonomous Consumption (A¯) = Rs 50 crore MPS = 0.2
So, MPC(b) = 1 – 0.2 = 0.8
(MPC = 1 – MPS)
AD = C + I
AD = C¯ + bY + I = A¯ + bY
= 50 + 0.8Y (A¯=C¯+I¯)
As we know, the equilibrium level of national income in two-sector model is determined where,
AS = AD
Y = 50 + 0.8Y
4000 = 50 + 0.8(4000)
4000 = 50 + 3200
4000 =3250
Hence, the economy is not in equilibrium.

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