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).
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As given in the examination problem, Equilibrium Income (Y) = Rs. 4000 crore. Autonomous Investment + Autonomous Consumption $(\bar{\text{A}})$ = Rs 50 crore MPS = 0.2 So, MPC(b) = 1 – 0.2 = 0.8 (MPC = 1 – MPS) AD = C + I $\text{AD}=\bar{\text{C}}+\text{bY}+\text{I}=\bar{\text{A}}+\text{bY}$ $=50+0.8\text{Y}(​​​​\bar{\text{A}}=​​​​\bar{\text{C}}+​​​​\bar{\text{I}})$
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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