An increase in the money supply will increase aggregate demand

During the twentieth century, the market structure of the U.S. economy has

A) become less competitive. B) remained about the same. C) become more competitive. D) become mostly monopolies.

The hidden-cost fallacy occurs when

a. A firm considers irrelevant costs b. A firm ignores relevant costs c. A firm considers overhead or depreciation costs to make short-run decisions d. Both a and c