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If equilibrium income is currently 16 trillion and the MPS is 0.2, and there is a 1 trillion dollar decrease in exports due to higher tariffs, what will be the new level of GDP?

A. 14.8 trillion
B. 15.2 trillion
C. 15.6 trillion
D. 16.0 trillion

Answer :

Final answer:

Assuming a 1 trillion decrease in exports, the new GDP would reduce by 5 trillion, leading to an equilibrium GDP of 11 trillion, so none of the options are correct.

Explanation:

If the equilibrium income is currently 16 trillion and the marginal propensity to save (MPS) is 0.2, to understand the effect of a t trillion dollar decrease in exports due to higher tariffs, one must utilize the spending multiplier.

The spending multiplier is the reciprocal of the MPS, which in this case is 1/0.2, or 5. A t trillion decrease in exports will lead to a 5t trillion decrease in the equilibrium GDP due to this spending multiplier effect.

The new equilibrium GDP would therefore be:

16 trillion - 5 trillion = 11 trillion.

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