What leads to a shift in the aggregate demand curve?

• A. Movement along the curve due to price changes
• B. A change in any of the components of Aggregate demand
• C. A change in technology
• D. A change in the money supply

Answer: (B)

Aggregate demand moves up or down in response to changes in the overall level of spending by households, firms, the government, and foreigners at different price levels. A shift in the aggregate demand curve happens when a non-price factor causes the total planned spending at every price level to change. If any component of aggregate demand—consumption, investment, government spending, or net exports—changes due to factors like income, consumer confidence, interest rates, fiscal or monetary policy, or exchange rates, the entire curve shifts to a new position, increasing or decreasing overall demand.

Movement along the curve would occur instead if the price level itself changed, while these determinants stayed the same. Technology affects production capacity and is a factor that shifts the aggregate supply curve, not the aggregate demand curve. A change in the money supply influences demand indirectly via interest rates, but the direct trigger for shifting the demand curve is a change in the components of demand themselves.