Suppose that an initial $40 billion increase in investment spending expands GDP by $40 billion in the first round of the multiplier process. If GDP and consumption both rise by $36 billion in the second round of the process, what is the MPC in this economy?
What is the size of the multiplier?
If, instead, GDP and consumption both rose by $38 billion in the second round, what would have been the size of the multiplier?