Question

Suppose disposable income increases by $ 2,000. As a result, consumption increases by $ 1,500. 1. The increase in savings resulting directly from this change in income is $ ________.2. The marginal propensity to save (MPS) is _________.3. The marginal propensity to consume (MPC) is _________.

Answer 1

1. The increase in savings resulting directly from this change in income is $500

That is

Increase in savings = Increase in income minus increase in consumption

= 2000 - 1500

= $ 500

2.The marginal propensity to save (MPS) is calculated by dividing the change in savings by the change in income.

That is

ΔS/ ΔY,

Therefore given

Change in savings =ΔS =$500

Change in income =ΔY = $2000

MPS = 500/2000

MPS = 0.25

3.The marginal propensity to consume (MPC) is calculated by dividing change in consumption by changes in come.

That is ΔC / ΔY

Where ΔC = 1500

ΔY = 2000

Therefore MPC = 1500/2000

= 0.75

1. The increase in savings resulting directly from this change in income is $