Movie theatres charge different prices to different groups of people based on the differing marginal costs that exist from group to group

The importance of international trade in the U.S. economy

A) has been decreasing and is expected to continue to decrease. B) has been decreasing but is expected to start to increase. C) has been increasing and is expected to continue to increase. D) has been increasing but is expected to decrease in the future.

When aggregate demand declines, the price level may remain constant, at least for a time, because:

A. firms individually may fear that their price cut may set off a price war. B. menu costs rise. C. price cuts tend to increase efficiency wages. D. product markets are highly competitive.