Table 18.1 Factors that Shift the Short-Run Aggregate Supply Curve

When this happens, . . .	. . . short-run aggregate supply increases:	But when this happens, . . .	. . . short-run aggregate supply decreases:
Changes in commodity prices:
When commodity prices fall, . . .	. . . short-run aggregate supply increases.	When commodity prices rise, . . .	. . . short-run aggregate supply decreases.
Changes in nominal wages:
When nominal wages fall, . . .	. . . short-run aggregate supply increases.	When nominal wages rise, . . .	. . . short-run aggregate supply decreases.
Changes in productivity:
When workers become more productive, . . .	. . . short-run aggregate supply increases.	When workers become less productive, . . .	. . . short-run aggregate supply decreases.
Changes in expectations about inflation:
If inflation is expected to be lower, . . .	. . . short-run aggregate supply increases.	If inflation is expected to be higher, . . .	. . . short-run aggregate supply decreases.