Explanation
Investment multiplier refers to the number of time by which the increase in output or income exceeds the increase in investment. It is measured as the ratio between change in income and change in investment and it is denoted as 'k'.
Multiplier(k) => Change in income / change in investment = 1/ {1-MPC(c)} where c is the marginal propensity to consume.
Therefore, the value of multiplier will be maximum when the value of MPC is either infinity or zero.
Aggregate Demand refers to the desired level of expenditure in the economy during an accounting year. It is what people wish to spend on the purchase of goods and services during an accounting year.
The Ad curve in income determination analysis represents a two sector economy which only includes the expenditure made by the consumer sector and the producer sector.
Therefore, aggregate demand = consumption + investment = C + I.
Investment multiplier refers to the number of times by which the increase in output or income exceeds the increase in investment. It is measured as the ratio between the change in income and change in investment and it is denoted as 'k'.
Multiplier(k) = Change in income / change in investment = 1/ {1-MPC(c)} where c is the marginal propensity to consume.
If MPC = 1, then
Multiplier(k)= 1/(1-1)= 1/0 = Infinity.
Therefore, the value of the multiplier is infinity. and the correct answer is D.
If MPC = 0, then
Multiplier(k)= 1/(1-0)= 1/1 = 1
Therefore, the value of the multiplier is 1.
Consumption function refers to the standard equation of consumption which defines the relationship between consumption and income where consumption value can be derived at each level with the use of income value.
C= c+ bY where c=autonomous consumption, b= marginal propensity to consume, and Y= income.
The Keynesian saving function is given as: S = -a +(1- b) Y
where, S= Savings,
a = autonomous consumption and
b = marginal propensity to consume
S = -500 + (1- 0.5) x 2500 = 750.
Level of savings = Rs. 750 crore.
b = marginal propensity to consume (MPC)
S = -700 + (1- 0.8) x 3500 = 0.
Level of savings = 0
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