Answer:
Suppose OPEC members met and decided to increase their oil production (and thus lower prices) for six months. This change will cause many firms' input prices in the U.S.A to decrease. This change in input prices will cause a shift in the aggregate supply curve.
Step-by-step explanation:
An aggregate supply curve shows the quantity of all the goods and services that businesses in an economy will sell at a particular price level. In the long run, the aggregate supply curve is vertical, but the aggregate supply curve will be upward sloping in the short run.
An increase in aggregate supply due to a decrease in input prices is represented by a shift to the right of the SAS curve.
Economic Growth is another factor that causes the aggregate supply curve to shift. Positive economic growth results from an increase in productive resources, such as labour and capital. Consequently, if the short-run curve shifts to the right the price level decreases and the GDP increases. When the curve shifts to the left, the price level increases and the GDP decreases.