The correct Answer is A-3, B-2, C-4, D-1
Explanation
This question pertains to macroeconomic concepts related to aggregate demand, investment, saving, and their impact on inventory levels. It involves understanding how changes in autonomous investment, marginal propensity to save, and demand-supply imbalances affect the aggregate demand curve and inventory adjustments.
Statement-wise Analysis
- A. Increase in Autonomous Investment:
- Correct. An increase in autonomous investment (investment not dependent on income) directly increases the aggregate demand at every income level. This results in an upward parallel shift of the Aggregate Demand (AD) curve.
- B. Increase in Marginal Propensity to Save (MPS):
- Correct. Marginal Propensity to Save (MPS) is the proportion of an increase in income that is saved. An increase in MPS implies a decrease in Marginal Propensity to Consume (MPC). A higher MPS means that for any given increase in income, a larger portion is saved, and a smaller portion is consumed. This leads to a reduction in aggregate demand at every income level, causing a downward swing (or shift) of the Aggregate Demand curve.
- C. Excess Demand:
- Correct. Excess demand occurs when aggregate demand exceeds aggregate supply at the current price level. When demand is greater than what is being supplied, firms experience an unintended depletion of their inventories as they sell more than they produce.
- D. Excess Supply:
- Correct. Excess supply occurs when aggregate supply exceeds aggregate demand at the current price level. When supply is greater than demand, firms are unable to sell all their output, leading to an unintended accumulation of inventories.
Key Takeaway
Changes in autonomous spending components (like autonomous investment) shift the aggregate demand curve, while changes in behavioral parameters (like MPS) alter its slope or position. Imbalances between aggregate demand and supply lead to unintended changes in inventory levels.