All increases in the level of human capital take place in schools

If a used-car dealer enjoys economic profits, then

A) as a group, its customers necessarily suffered a like amount in economic losses. B) as a group, its customers were necessarily made worse off. C) as a group, its competitors necessarily suffered economic losses. D) all of the above are true. E) none of the above is true.

From the late 1980s to 2000, the natural rate of unemployment

A. held constant. B. fluctuated up and down, following the path of the actual rate of unemployment. C. climbed sharply. D. gradually declined.