Full employment, which is always expected to occur, consists of the frictionally and cyclically unemployed

A production possibilities frontier can shift outward for all of the following reasons except one. Which is the exception?

a. a decrease in the unemployment rate b. an improvement in labor skills c. an improvement in technology d. a larger work force e. a larger capital stock

Short-run average cost is

A. less than short-run marginal cost when short-run marginal cost is decreasing. B. always greater than long-run average cost. C. always less than long-run average cost. D. both a and c E. none of the above