Answer: The change will be $400 billion.
Explanation: The marginal propensity to consume (MPC) is used to explain that increase in consumption is as a result of increase in income.
To calculate how much the equilibrium real GDP will change:
STEP1: CALCULATE THE MULTIPLIERS
multipliers = 1 ÷ (1 - MPC)
Where MPC = 0.
Therefore;
Multipliers = 1 ÷ (1 - 0.5) = 1 ÷ 0.5
Multipliers = 2
STEP 2: CALCULATE HOW MUCH THE EQUILIBRIUM REAL GDP WILL CHANGE;
Multipliers × change in consumption spending
2 × $200 billion = $400 billion
Equilibrium real GDP will change with $400 billion
