Which organization primarily makes and guarantees loans to developing nations for basic development projects such as the construction of dams, roads, and schools?

If the economy is at full employment, then the unemployment rate

A) is greater than the natural unemployment rate. B) is equal to the natural unemployment rate. C) is below the natural unemployment rate. D) is equal to zero. E) can be anywhere on a short-run Phillips curve.

The law of diminishing returns applies to

A) the short run only. B) the long run only. C) both the short and the long run. D) neither the short nor the long run. E) all inputs, with no reference to the time period.