AP Macroeconomics Quiz: The Aggregate Demand Aggregate Supply Model

What this quiz covers

This quiz focuses on The Aggregate Demand Aggregate Supply Model, giving you a quick way to practice the rules, question types, and explanations that matter most for AP Macroeconomics.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. The price level rises and real GDP rises. (correct answer)
2. The price level falls and real GDP rises.
3. The price level rises and real GDP falls.
4. The price level falls and real GDP falls.
5. The price level is unchanged and real GDP rises.

Explanation: The AD-AS model equilibrium occurs where aggregate demand intersects short-run aggregate supply, establishing the economy's price level and real GDP. When the central bank purchases government securities, it increases the money supply, lowering interest rates and stimulating spending, which shifts AD rightward from AD₁ to AD₂. The graph shows this rightward AD shift creates a new equilibrium E₂ at a higher point on the upward-sloping SRAS curve, resulting in both higher price levels and higher real GDP. This exemplifies expansionary monetary policy's short-run effects—increased money supply boosts spending and output while causing some inflation. A common error is assuming monetary policy affects only prices or only output, but in the short run, both change. The key insight is that rightward AD shifts (from any expansionary policy) create movements up along SRAS, raising both price level and real GDP.

Question 2

1. Demand-pull; the price level rises and real GDP rises. (correct answer)
2. Demand-pull; the price level falls and real GDP rises.
3. Cost-push; the price level rises and real GDP falls.
4. Cost-push; the price level falls and real GDP rises.
5. Demand-pull; the price level is unchanged and real GDP rises.

Explanation: The AD-AS equilibrium represents the intersection point of aggregate demand and short-run aggregate supply curves, determining both price level and real GDP in the economy. When government increases purchases of goods and services, this directly increases aggregate demand, shifting the AD curve rightward from AD₁ to AD₂. The graph demonstrates that this rightward AD shift creates a new equilibrium E₂ at a higher point along the SRAS curve, resulting in both higher price levels and higher real GDP—this is called demand-pull inflation because increased demand pulls prices upward. This exemplifies expansionary fiscal policy's short-run effects on the economy. A common misconception is confusing demand-pull with cost-push changes; demand-pull always involves AD shifting and creates positive correlation between prices and output. The diagnostic strategy is to identify the initial shift (here, AD right from fiscal expansion) and trace the new equilibrium along the other curve.

Question 3

1. The price level rises and real GDP rises.
2. The price level falls and real GDP rises.
3. The price level rises and real GDP falls. (correct answer)
4. The price level falls and real GDP falls.
5. The price level is unchanged and real GDP falls.

Explanation: The AD-AS equilibrium point shows where aggregate demand meets short-run aggregate supply, determining the economy's price level and real GDP simultaneously. When nominal wages increase rapidly, firms face higher per-unit production costs, causing the SRAS curve to shift leftward from SRAS₁ to SRAS₂. On the graph, this leftward SRAS shift creates a new equilibrium E₂ where the unchanged AD curve intersects the new SRAS₂ at a higher price level but lower real GDP. This illustrates wage-push inflation, a type of cost-push inflation where higher labor costs reduce supply while raising prices. A key misconception is thinking wage increases always benefit the economy—in the short run, they can cause stagflation. The diagnostic strategy is recognizing that leftward SRAS shifts (from any cost increase) force the economy up along the AD curve, raising prices while reducing output.

Question 4

1. An increase in consumer wealth that raises consumption spending.
2. A decrease in business taxes that increases investment spending.
3. A decrease in input prices that lowers firms' per-unit costs. (correct answer)
4. An increase in government purchases that raises aggregate demand.
5. A decrease in interest rates that increases consumption and investment.

Explanation: In the AD-AS framework, equilibrium is determined by where aggregate demand meets short-run aggregate supply, setting both price level and real GDP. The question indicates SRAS shifts rightward from SRAS₁ to SRAS₂, which lowers price level while raising real GDP at the new equilibrium E₂. Among the options, only a decrease in input prices (option C) would shift SRAS rightward—lower input costs reduce firms' per-unit production costs, enabling them to supply more at any price level. Options A, B, D, and E all affect aggregate demand rather than short-run aggregate supply. Students often confuse demand-side and supply-side factors; remember that SRAS shifts result from changes in production costs or productivity, not spending changes. The diagnostic approach is recognizing that rightward SRAS shifts must stem from factors that reduce costs or increase productivity, making production more profitable.

Question 5

1. Real GDP decreases and the price level decreases in the short run.
2. Real GDP increases and the price level increases in the short run. (correct answer)
3. Real GDP increases and the price level decreases in the short run.
4. Real GDP decreases and the price level increases in the short run.
5. Real GDP returns to its initial level because wages adjust in the long run.

Explanation: The AD-AS model's equilibrium point, where aggregate demand meets short-run aggregate supply, determines the economy's price level and real GDP simultaneously. A reduction in business taxes increases firms' after-tax profits, encouraging more investment spending, which shifts the AD curve rightward from AD1 to AD2. Following the graph from E1 to E2, the new equilibrium shows both higher price levels and higher real GDP in the short run. Students sometimes confuse tax cuts on businesses with supply-side effects, but investment is a component of aggregate demand, so this is a demand-side shift. The strategy is to identify which spending component changes (investment increases), determine the curve affected (AD shifts right), and trace the new equilibrium along the upward-sloping SRAS.

Question 6

1. The price level rises and real GDP rises.
2. The price level falls and real GDP rises. (correct answer)
3. The price level rises and real GDP falls.
4. The price level falls and real GDP falls.
5. The price level is unchanged and real GDP rises.

Explanation: In the AD-AS model, equilibrium occurs at the intersection of aggregate demand and short-run aggregate supply, jointly determining price level and real GDP. When technological improvements increase productivity, firms can produce more output at any given cost, shifting SRAS rightward from SRAS₁ to SRAS₂. The graph shows this rightward SRAS shift creates a new equilibrium E₂ where the unchanged AD curve intersects the new SRAS₂ at a lower price level but higher real GDP. This represents the ideal scenario of technology-driven growth—more output with lower prices, benefiting consumers through both increased availability and affordability. Students often mistakenly assume all supply shifts are negative, but positive supply shocks like productivity gains shift SRAS right. The key insight is that rightward SRAS shifts (from any efficiency gain) create movement down along the AD curve, lowering prices while expanding output.

Question 7

1. The price level rises and real GDP rises. (correct answer)
2. The price level falls and real GDP rises.
3. The price level rises and real GDP falls.
4. The price level falls and real GDP falls.
5. The price level is unchanged and real GDP rises.

Explanation: In the AD-AS model, equilibrium occurs where aggregate demand (AD) intersects short-run aggregate supply (SRAS), determining both the price level and real GDP. When consumer confidence rises and households increase spending, the AD curve shifts rightward from AD₁ to AD₂. Looking at the graph, this rightward shift creates a new equilibrium E₂ at a higher point along the upward-sloping SRAS curve, resulting in both a higher price level and higher real GDP. This illustrates demand-pull effects where increased spending pulls prices up while expanding output. A common misconception is confusing short-run effects (movement along SRAS) with long-run adjustments (shifts in SRAS). The key strategy is to identify which curve shifts first—here it's AD shifting right—then trace the new intersection point to determine changes in both price level and output.

Question 8

1. The price level rises and real GDP rises.
2. The price level falls and real GDP rises.
3. The price level rises and real GDP falls.
4. The price level falls and real GDP falls. (correct answer)
5. The price level is unchanged and real GDP falls.

Explanation: In the AD-AS framework, equilibrium is determined by the intersection of aggregate demand and short-run aggregate supply curves, setting both price level and real GDP. When payroll taxes increase, households have less disposable income to spend, causing AD to shift leftward from AD₁ to AD₂. The graph illustrates that this leftward AD shift creates a new equilibrium E₂ at a lower point on the SRAS curve, resulting in both lower price levels and lower real GDP. This represents contractionary fiscal policy's effects—reduced spending leads to lower output and some deflation. Students often confuse the direction of shifts; remember that policies reducing spending shift AD left, not right. The strategy is to identify that decreased disposable income shifts AD left, then trace the new intersection down along SRAS to find lower prices and output.

Question 9

1. The price level rises and real GDP rises.
2. The price level falls and real GDP rises.
3. The price level rises and real GDP falls. (correct answer)
4. The price level falls and real GDP falls.
5. The price level is unchanged and real GDP falls.

Explanation: The AD-AS equilibrium represents the intersection of aggregate demand and short-run aggregate supply curves, determining the economy's price level and real GDP. When oil prices increase sharply, firms face higher production costs, causing the SRAS curve to shift leftward from SRAS₁ to SRAS₂. On the graph, this leftward shift creates a new equilibrium E₂ where the unchanged AD curve intersects the new SRAS₂ at a higher price level but lower real GDP. This demonstrates cost-push inflation—rising costs push prices up while reducing output, creating stagflation. Students often mistakenly think all inflation increases output, but cost-push inflation uniquely combines higher prices with lower output. The strategy is to recognize that when SRAS shifts left due to higher costs, the economy moves up along the AD curve to a point with higher prices and lower output.

Question 10

1. The price level decreases and real GDP decreases in the short run. (correct answer)
2. The price level increases and real GDP increases in the short run.
3. The price level decreases and real GDP increases in the short run.
4. The price level increases and real GDP decreases in the short run.
5. The price level returns to its initial level and real GDP returns to its initial level in the long run.

Explanation: In the AD-AS model, equilibrium occurs where aggregate demand (AD) intersects short-run aggregate supply (SRAS), determining both the price level and real GDP. When consumer confidence decreases, households reduce spending, causing the AD curve to shift leftward from AD1 to AD2. Looking at the graph, this leftward shift moves the equilibrium from E1 to E2, resulting in both a lower price level and lower real GDP in the short run. A common misconception is confusing movements along a curve with shifts of the curve—here, the entire AD curve shifts left, not just a movement along it. The key strategy is to identify which curve shifts first (AD shifts left due to decreased confidence), then trace the new intersection point to see how both price level and output change.

Question 11

1. The price level rises and real GDP rises in the short run.
2. The price level falls and real GDP falls in the short run. (correct answer)
3. The price level rises and real GDP falls in the short run.
4. The price level falls and real GDP rises in the short run.
5. The price level returns to its initial level because the long-run aggregate supply curve is vertical.

Explanation: The AD-AS equilibrium occurs where aggregate demand intersects short-run aggregate supply, jointly determining the economy's price level and real GDP. Contractionary monetary policy reduces the money supply or raises interest rates, decreasing investment and consumption spending—this shifts AD leftward from AD1 to AD2. The graph shows this moves equilibrium from E1 to E2, resulting in both lower price levels and lower real GDP in the short run. Students sometimes expect only prices to fall with tight money, but the short-run trade-off means output falls too. The key strategy for monetary policy analysis is remembering that contractionary policy shifts AD left (reducing spending), while expansionary policy shifts AD right, with corresponding effects on both prices and output.

Question 12

1. The price level decreases and real GDP increases in the short run.
2. The price level increases and real GDP decreases in the short run. (correct answer)
3. The price level increases and real GDP increases in the short run.
4. The price level decreases and real GDP decreases in the short run.
5. The price level returns to its initial level as wages adjust in the long run.

Explanation: The AD-AS equilibrium represents the intersection of aggregate demand and short-run aggregate supply, determining the economy's price level and real GDP. When oil prices increase sharply, this raises production costs for firms across the economy, causing the SRAS curve to shift leftward (upward) from SRAS1 to SRAS2. Following the graph from E1 to E2, we see the new equilibrium occurs at a higher price level but lower real GDP—this combination is called stagflation. Students often mistakenly think supply shocks affect only prices or only output, but they impact both simultaneously in opposite directions. The strategy for analyzing supply shocks is to remember that leftward SRAS shifts always create this inverse relationship: prices rise while output falls in the short run.

Question 13

1. The price level rises and real GDP rises from their initial equilibrium values.
2. The price level rises and real GDP falls from their initial equilibrium values.
3. The price level falls and real GDP falls from their initial equilibrium values. (correct answer)
4. The price level falls and real GDP rises from their initial equilibrium values.
5. The price level and real GDP remain unchanged from their initial values.

Explanation: In the AD-AS model, equilibrium is defined by the meeting of aggregate demand (AD) and short-run aggregate supply (SRAS), setting short-run price level (PL) and real GDP (Y). As illustrated, the economy shifts from E1 to E2 with AD moving left to AD2 and SRAS steady, causing a contraction. This leads to lower PL and lower Y because decreased demand reduces both pricing power and output. The PL falls with slack in the economy, and Y declines as spending cuts ripple through production. A misconception is assuming long-run self-correction happens quickly, but short-run effects persist due to price and wage rigidities. For analysis, first identify the shifting curve—AD left from demand reducers—and compare the new equilibrium to the initial one.

Question 14

1. An increase in government spending on infrastructure projects.
2. A decrease in the money supply that raises interest rates. (correct answer)
3. A decrease in oil prices that lowers firms' input costs.
4. An increase in productivity that lowers per-unit production costs.
5. A decrease in nominal wages that reduces firms' costs of production.

Explanation: The AD-AS model's equilibrium occurs where aggregate demand and short-run aggregate supply curves intersect, determining the economy's price level and real GDP. The question shows AD shifting leftward from AD₁ to AD₂, which reduces both price level and real GDP at the new equilibrium E₂. Among the options, only a decrease in money supply that raises interest rates would shift AD leftward—higher interest rates discourage borrowing and spending by both consumers and businesses, reducing aggregate demand. Options A would shift AD right, while options C, D, and E would shift SRAS right, not affect AD. A common error is confusing which policies affect which curves; monetary and fiscal policies primarily shift AD, while cost and productivity changes shift SRAS. The strategy is to match the direction and curve of the shift shown (leftward AD) with policies that reduce spending.

Question 15

1. Demand-pull; the price level rises and real GDP rises.
2. Demand-pull; the price level falls and real GDP falls.
3. Cost-push; the price level rises and real GDP falls. (correct answer)
4. Cost-push; the price level falls and real GDP rises.
5. Demand-pull; the price level is unchanged and real GDP falls.

Explanation: In the AD-AS framework, equilibrium is found where aggregate demand intersects short-run aggregate supply, establishing the economy's price level and real GDP. When a natural disaster disrupts supply chains, it increases production costs and reduces firms' ability to produce, shifting SRAS leftward from SRAS₁ to SRAS₂. The graph shows this leftward SRAS shift creates a new equilibrium E₂ where the unchanged AD curve meets the new SRAS₂ at a higher price level but lower real GDP—this is cost-push inflation because rising costs push prices up while reducing output. This represents a negative supply shock causing stagflation (stagnant growth with inflation). Students often confuse supply disruptions with demand changes, but supply problems shift SRAS, not AD. The key insight is that leftward SRAS shifts force the economy up along the AD curve, creating the problematic combination of higher prices with lower output.

Question 16

1. The price level increases and real GDP increases in the short run.
2. The price level decreases and real GDP increases in the short run. (correct answer)
3. The price level increases and real GDP decreases in the short run.
4. The price level decreases and real GDP decreases in the short run.
5. The price level returns to its initial level because aggregate demand shifts back in the long run.

Explanation: In the AD-AS model, equilibrium occurs at the intersection of aggregate demand and short-run aggregate supply, jointly determining price level and real GDP. When nominal wages fall, firms' per-unit production costs decrease, making production more profitable at any given price level—this shifts the SRAS curve rightward from SRAS1 to SRAS2. The graph shows movement from E1 to E2 results in a lower price level but higher real GDP in the short run. A common misconception is thinking wage changes affect demand rather than supply, but wages are an input cost affecting the supply side. The analytical strategy is recognizing that rightward SRAS shifts (from lower costs) always create this beneficial combination: lower prices with higher output, moving down along the AD curve.

Question 17

1. A decrease in household wealth that reduces consumption and shifts aggregate demand left.
2. A decrease in expected inflation that increases short-run aggregate supply. (correct answer)
3. An increase in government spending that shifts aggregate demand right.
4. A decrease in the price level that increases quantity demanded along the aggregate demand curve.
5. A long-run increase in productivity that shifts long-run aggregate supply to the right.

Explanation: In the AD-AS framework, equilibrium is determined by the intersection of aggregate demand and short-run aggregate supply curves, establishing price level and real GDP. The graph shows SRAS shifting rightward from SRAS1 to SRAS2, moving equilibrium from E1 to E2. A decrease in expected inflation reduces workers' wage demands and firms' pricing expectations, lowering production costs and shifting SRAS rightward. This results in lower prices and higher output at E2. Students often confuse expected inflation with actual price level changes—expected inflation affects supply decisions before actual prices adjust. The strategy for identifying SRAS shifts is to look for factors affecting production costs or expectations, not spending patterns which would shift AD instead.

Question 18

1. The price level increases and real GDP increases in the short run. (correct answer)
2. The price level decreases and real GDP decreases in the short run.
3. The price level increases and real GDP decreases in the short run.
4. The price level decreases and real GDP increases in the short run.
5. The price level returns to its initial level as output returns to potential in the long run.

Explanation: In the AD-AS framework, equilibrium is found where the aggregate demand curve intersects the short-run aggregate supply curve, establishing the economy's price level and real GDP. Government spending is a component of aggregate demand, so increased government spending shifts the AD curve rightward from AD1 to AD2. Tracing the movement from equilibrium E1 to E2 on the graph shows that both the price level and real GDP increase in the short run. A common error is thinking that only output changes with fiscal policy, but the upward-sloping SRAS means that increased demand raises both prices and output. The key analytical approach is recognizing that rightward AD shifts (from expansionary policies) always move the economy up along the SRAS curve, increasing both variables.

Question 19

1. Demand-pull; the price level rises and real GDP rises in the short run.
2. Cost-push; the price level rises and real GDP falls in the short run. (correct answer)
3. Demand-pull; the price level falls and real GDP falls in the short run.
4. Cost-push; the price level falls and real GDP rises in the short run.
5. Cost-push; the price level returns to its initial level as output returns to potential in the long run.

Explanation: The AD-AS model equilibrium, where aggregate demand meets short-run aggregate supply, determines the economy's price level and real GDP. The graph shows SRAS shifting leftward from SRAS1 to SRAS2, moving from E1 to E2 with higher prices but lower output—this is cost-push inflation. Cost-push inflation occurs when rising production costs (like oil prices or wages) shift SRAS left, while demand-pull inflation involves AD shifting right. The key distinction is that cost-push creates stagflation (higher prices with lower output), while demand-pull raises both. Students often mislabel all inflation as demand-pull, but the strategy is examining which curve shifts and the resulting price-output combination: leftward SRAS shifts always indicate cost-push inflation.

Question 20

1. An increase in government purchases that raises aggregate demand. (correct answer)
2. An increase in input prices that shifts short-run aggregate supply left.
3. A decrease in nominal wages that shifts short-run aggregate supply right.
4. A decrease in the price of a single product that increases quantity demanded for that product.
5. A long-run increase in potential output that shifts the long-run aggregate supply curve right.

Explanation: The AD-AS equilibrium represents where aggregate demand intersects short-run aggregate supply, determining both price level and real GDP for the economy. The graph shows AD shifting rightward from AD1 to AD2, moving equilibrium from E1 to E2 with both higher prices and higher output. Among the options, only an increase in government purchases directly shifts AD rightward—government spending is a component of aggregate demand (C + I + G + NX). Students often confuse single-product price changes with aggregate price level changes, but individual product prices don't shift AD curves. The key strategy is distinguishing between factors that shift AD (spending components), SRAS (production costs), and LRAS (potential output), then matching the observed shift pattern.