When an asset is used as a universal yardstick that is used for expressing the worth of different goods and services, it is serving the function of a ________

For the past decade, the unemployment rate in Western Europe has been higher than the unemployment rate in the United States

Based on this fact, is the natural unemployment rate larger in Western Europe or in the United States? Why might the natural rates differ between the two areas?

Which of the following costs always declines as output increases?

A) Average cost B) Marginal cost C) Fixed cost D) Average fixed cost E) Average variable cost