Target Exam

CUET

Subject

Economics

Chapter

Macro Economics: Determination of Income and Employment

Question:

Suppose, following data is presented, for an imaginary economy:

Autonomous Consumption = ₹100 crore

Marginal Propensity to Consume = 0.6

Investment = ₹200 crore.

Identify which of the following is the correct value of national income?

Options:

₹750 crore

₹800 crore

₹900 crore

₹600 crore

Correct Answer:

₹750 crore

Explanation:

The correct answer is Option (1) → ₹750 crore

To find the correct value of national income, we can use the Keynesian model's equilibrium condition where National Income (Y) equals Aggregate Demand (AD). In a simple economy with autonomous consumption, induced consumption, and investment, the aggregate demand is given by:

AD = C + I

Where:

C = Consumption

I = Investment

The consumption function is given by:

C = Autonomous Consumption + (Marginal Propensity to Consume * Y)

C =$\bar C$ + cY

Given the data:

Autonomous Consumption ($\bar C$) = ₹100 crore

Marginal Propensity to Consume (c) = 0.6

Investment (I) = ₹200 crore

Substitute the consumption function into the aggregate demand equation:

AD = ($\bar C$ + cY) + I

At equilibrium, Y = AD: i.e Y = $\bar C$ + cY + I

Y = 100 + 0.6Y + 200

Y = 300 + 0.6Y

Y - 0.6Y = 300

0.4Y = 300

Y =  750

Y = 750

Therefore, the correct value of national income is ₹750 crore.