Which of the following is not an example of market failure?

________ unemployment is most closely associated with periods of falling GDP

A) Frictional B) Cyclical C) Structural D) Voluntary

If a production possibilities frontier is bowed out (concave to the origin), then production occurs under conditions of

A) constant opportunity costs. B) increasing opportunity costs. C) decreasing opportunity costs. D) infinite opportunity costs. E) uncertain opportunity costs.