Question 75

Investment tax credit increases economic growth by raising MPS.

Investment tax credits enhance economic growth primarily by raising the marginal propensity to save (MPS). This increase in savings can lead to more investments, which stimulates economic activity and growth.

A) shifting PPC inward

Shifting the Production Possibility Curve (PPC) inward would indicate a decrease in an economy's productive capacity, which is not the effect of an investment tax credit. Such credits are designed to promote investment and economic activity, thereby shifting the PPC outward, not inward.

B) shifting LRAS right

While an increase in investment can contribute to a rightward shift of the Long-Run Aggregate Supply (LRAS), the immediate effect of an investment tax credit is more closely associated with increasing savings. Thus, while related, this option does not directly address the core mechanism of how investment tax credits function.

C) lowering MPC

Lowering the marginal propensity to consume (MPC) would typically result in less immediate consumption, which does not align with the purpose of investment tax credits. These credits are intended to encourage saving and investment rather than reducing consumption tendencies.

D) raising MPS

Raising the marginal propensity to save (MPS) is the correct answer as it directly correlates with the function of investment tax credits. By incentivizing businesses to invest, these credits lead to increased savings, which can then be utilized for further investments, thereby promoting economic growth.

Conclusion

Investment tax credits effectively raise the marginal propensity to save, which fosters greater investment and economic growth. Other options either misrepresent the effects of the credits or describe less relevant economic phenomena. Therefore, Option D is definitively the correct answer.