Question

Suppose that the level of GDP increased by $100 billion in a private closed economy where the marginal propensity to consume is 0.5. Aggregate expenditures must have increased by $5 billion. $100 billion. $50 billion. $500 billion.

Answer 1

Answer:

$50 billion

Explanation:

To find the change in aggregate expenditures, we need to find the change in consumption. For this, we will use the marginal propensity to consume formula:

MPC = ΔC/ΔY

Where:

MPC = Marginal propensity to consume

ΔC = Change in consumption

ΔY = Change in output (GDP)

We know that out MPC is 0.5, and our ΔY is $billion. We plug these amounts into the formula:

0.5 = ΔC / 100 billion

And we rearrange the equation to solve for ΔC

ΔC = $ 100 billion x 0.5

ΔC = $50 billion

So the change in consumption is $50 billion, which is also the change in aggregate expenditure.