Question

Suppose that investment demand increases by $300 billion in a closed and private economy (no government or foreign trade). Assume further that households have a marginal propensity to consume of 80 percent. Ultimately, how much will aggregate demand increase? Enter your answer in billions. For example if your answer is $600 billion then enter 600. If your answer is $1,500 then enter 1500.

Answer 1

Aggregate demand increase by $1500 billion.

Answer is 1500

Step-by-step explanation:

Investment demand increases by $300 billion.

MPC = 0.80

Multiplier = 1 / (1-MPC)

Multiplier = 1 / (1-0.8)

Multiplier = 1 / 0.2

Multiplier = 5

Multiplier = Change in GDP / Change in investment

5 = Change in GDP / $300 billion

Change in GDP = 5 * $300 billion

Change in GDP = $1500 billion.