Answer to Question #50884 in Macroeconomics for Yoyo

Question

Explain why the following statements is True, False, or Uncertain according to economic principles. Use diagrams where appropriate. It is the explanation that is important.
In an aggregate expenditure model with no government or foreign sectors, represented by C = a + bY and I(an autonomous amount), an increase in the marginal propensity to save causes the multiplier to rise.

Answer 1

In an aggregate expenditure model with no government or foreign sectors, an increase in the marginal propensity to save causes the multiplier to decrease, because the formula for calculating multiplier is m = 1/(1 - c) = 1/s, where s - marginal propensity to save.
So, the statement is False.