A tariff is a tax imposed by a government on

Compared to a sampling of other developed nations, the U.S. income distribution is more unequal than many others. What accounts for this?

A) The lowest-income families in the United States earn much less than the lowest-income households in other nations. B) Marginal income tax rates are much higher in the United States than in any other nation. C) The highest-income families in the United States earn much more than the highest-income households in other nations. D) Other nations manipulate their data to look better.

The aggregate cost of unemployment can be measured by the:

A. amount by which actual GDP exceeds potential GDP. B. amount by which potential GDP exceeds actual GDP. C. excess of real GDP over nominal GDP. D. excess of nominal GDP over real GDP.