Question

Suppose business decision makers become more optimistic about the future and, as a result, increase their investment spending by $20 billion. If the economy's marginal propensity to consume is 0.75, the equilibrium level of aggregate real GDP will increase by____________.

Answer 1

$80 million

Step-by-step explanation:

We know that

Multiplier = (1) ÷ (1 - marginal propensity to consume)

= (1) ÷ (1 - 0.75)

= (1) ÷ (0.25)

= 4

Now the GDP would increase by

= Increase in Investment spending × multiplier effect

= $20 billion × 4

= $80 million increase

We simply multiplied the investment spending increase with the multiplier effect