If an economy is operating at a point outside the PPC, either the society has resources that are not being fully used or production is not efficient

Fiscal policy is most effective in influencing aggregate demand

A. under a fixed exchange-rate system without sterilization. B. under a floating exchange-rate system with a high degree of capital mobility. C. under a floating exchange-rate system with a low degree of capital mobility. D. under a fixed exchange-rate system with sterilization.

The term "statistical significance" is commonly applied to a p-value of

A. ? 1. B. ? 0.10. C. ? 0.05. D. ? 0.5.