6. The sources of inflation During World War I and World War II, the U.S. government spent large sums of money on the war effort. Following both of these periods, the United States experienced double-digit inflation. The following graph shows the aggregate demand (AD) and aggregate supply (AS) curves for the United States before the inflationary period. Shift one of the curves on the graph to illustrate the primary cause of the infilation described in the preceding paragraph. Note: Select and drag one or both of the curves to the desired position. Curves will snap into position, so if you try to move a curve and it snaps back to its original position, just drag it a little farther. AD SRAS SRAS PRICE LEVEL AD REAL GOP This kind of inflation is called inflation. Inflation of this type is accompanied by in aggregate output