The C line is above the 45-degree line only at __________ levels of income.

The labor force is the sum of

A) employed workers and individuals not looking for work. B) unemployed workers and the working-age population. C) employed workers and discouraged workers. D) employed workers and unemployed workers.

Alcoa had a monopoly in the U.S. aluminum market from the late nineteenth century until the end of World War II. Which barrier to entry was the source of Alcoa's monopoly power?

A. ownership of a vital resource B. government franchises and licenses C. patents and copyrights D. economies of scale