Questions: Which of the following causes the short-run aggregate supply curve to shift to the right? A. an increase in the expected price of an important natural resource B. a higher expected future price level C. a decrease in the capital stock D. a positive technological change Which of the following causes the short-run aggregate supply curve to shift to the left? A. an increase in the expected price of an important natural resource B. an increase in productivity C. an increase in the labor force D. a positive technological change

The answer to the first question is D. a positive technological change.
The answer to the second question is A. an increase in the expected price of an important natural resource.

• Option A: An increase in the expected price of an important natural resource
  This would typically cause the short-run aggregate supply (SRAS) curve to shift to the left, not the right, because higher expected prices for resources increase production costs, reducing supply.

• Option B: A higher expected future price level
  This would also likely shift the SRAS curve to the left. If firms expect higher future prices, they might reduce supply now to sell at higher prices later.

• Option C: A decrease in the capital stock
  A decrease in capital stock would reduce the productive capacity of the economy, shifting the SRAS curve to the left.

• Option D: A positive technological change
  Positive technological changes improve productivity, allowing more output to be produced with the same amount of inputs, thus shifting the SRAS curve to the right.

• Option A: An increase in the expected price of an important natural resource
  This would increase production costs, leading to a decrease in supply, and thus shift the SRAS curve to the left.

• Option B: An increase in productivity
  An increase in productivity would shift the SRAS curve to the right, not the left, as it allows more output to be produced with the same inputs.

• Option C: An increase in the labor force
  An increase in the labor force would typically shift the SRAS curve to the right, as more labor means more potential output.

• Option D: A positive technological change
  Similar to an increase in productivity, a positive technological change would shift the SRAS curve to the right, not the left.