7. Determinants of aggregate supply The following graph shows an increase in short-run aggregate supply (AS) in a hypothetical economy where the currency is the dollar Specifically, the short-run aggregate supply curve shifts to the right from AS, to AS2, causing the quantity of output supplied at a price level of 100 to rise from $200 billion to $250 billion.

8. Economic fluctuations I The following graph shows the economy in long-run equilibrium at the expected price level of 120 and the natural level of output of $600 billion. Suppose the government increases spending on building and repairing highways, bridges, and ports. Shift the short-run aggregate supply (AS) curve or the aggregate demand (AD) curve to show the short-run impact of the increase in government spending. 240 AS 200 AD 160 AS 120 80 AD 40 200 400 600 800 1000 1200 OUTPUT (Billions of dollars) In the short run, the increase in government spending on infrastructure causes the price level to the price level people expected and the quantity of output to the natural level of output. The increase in government spending will cause the unemployment rate to the natural rate of unemployment in the short run. Again, the following graph shows the economy in long-run equilibrium at the expected price level of 120 and the natural level of output of $600 billion, before the increase in…

7. The long-run aggregate supply curve and short-run adjustments Suppose an economy's short-run aggregate supply curve (SRAS), current equilibrium aggregate price level (P₁), and real GDP (Q1) are shown on the graph that follows. The economy currently has Natural Real GDP (QN) of $6 trillion. Use this information to place the orange long-run aggregate supply curve (LRAS, square symbols) in the correct position on the graph. 20 PRICE LEVEL 0 2 4 6 Q₁ REAL GDP (Trillions of dollars) 8 SRAS 10 LRAS

3. Why the aggregate demand curve slopes downward The graph below shows the aggregate demand (AD) curve for a hypothetical economy. At point X, the quantity of output demanded is $500 billion, and the price level is 120. Moving up along the AD curve from point X to point Y, the quantity of output demanded falls to $300 billion, and the price level rises to 140. PRICE LEVEL 170 160 150 140 130 120 110 100 90 Y X AD (?