Who would be more likely to study the effects of government spending on the unemployment rate, a macroeconomist or a microeconomist?

For a firm in monopolistic competition, selling costs

A) increase costs and reduce profits. B) always increase demand. C) can change the quantity produced and lower the average total cost. D) can lower total cost. E) have no effect on the quantity sold.

Since the founding of the IMF, most international reserves have been held in

A) gold. B) silver. C) U.S. dollars. D) British pounds sterling.