Topic: Classical Macroeconomics and the Quantity Theory of Money
Understanding the Question:
What is the impact of an increase in the money supply according to the Classical school of thought?
Key Formulas and Approach:
Classical economics relies on the Quantity Theory of Money: $MV = PY$. Since $V$ (velocity) and $Y$ (real output at full employment) are assumed constant in the Classical model, an increase in $M$ must lead to an increase in $P$.
Detailed Solution:
Step 1: Analyze Aggregate Demand (AD). In the Classical framework, the AD curve is derived from the equation $M = kPY$. An increase in $M$ (money stock) increases the level of spending at every price level.
Step 2: Determine the shift. Increased spending power translates to a rightward shift of the Aggregate Demand curve.
Step 3: Evaluate the real variables. Because the Classical Aggregate Supply (AS) curve is vertical at full employment, the shift in AD only increases the price level ($P$), not the real output ($Y$). This is known as the Neutrality of Money.
Conclusion: An increase in the money stock shifts the AD curve to the right.