Question

if stricter immigration laws are imposed and many foreign workers in the united states are forced to go back to their home countries,
a. we will move up along the long-run aggregate supply curve.
b. the long-run aggregate supply curve will shift to the left.
c. we will move down along the long-run aggregate supply curve.
d. the long-run aggregate supply curve will shift to the right.

Explanation:

The long - run aggregate supply (LRAS) curve is vertical and represents the economy's potential output, which depends on factors like the quantity and quality of labor, capital, natural resources, and technology. When stricter immigration laws force many foreign workers to return to their home countries, the quantity of labor in the US decreases. A decrease in a factor of production (labor, in this case) that affects potential output will shift the LRAS curve to the left. Moving along the LRAS curve occurs due to changes in the price level, not changes in factors of production that affect potential output. So options A and C are incorrect as they involve movements along the curve, and option D is incorrect as a decrease in labor would not shift the curve to the right.

Answer:

B. the long - run aggregate supply curve will shift to the left.