Answer:
Change in G = $90 billion
Step-by-step explanation:
Data provided in the question:
Shift in demand curve, ΔY = $300 billion
Marginal propensity to consume (MPC) = 0.7
Now,
Government spending multiplier
⇒ ΔY ÷ ΔG = 1 ÷ ( 1 - MPC )
or
⇒ $300 billion ÷ ( Change in G ) = 1 ÷ ( 1 - 0.7 )
or
Change in G = $300 billion × ( 1 - 0.7 )
or
Change in G = $300 billion × 0.3
or
Change in G = $90 billion