Which of the following must be true to have a closed economy…

Source: JAMB · 2023

Which of the following must be true to have a closed economy with no government, and yet the value of the investmet multiplier still increase?

  1. Actual saving has fallen
  2. Marginal propensity to save has fallen ✓
  3. Actual investment had fallen
  4. Average propensity to invest has fallen
Explanation

In a closed economy with no government, multiplier = 1 ÷ MPS.

If the marginal propensity to save has fallen, the denominator is smaller, so the multiplier is larger. Less leaks out as saving, and more is spent again.

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