Since the mid-1980s, the United States has been a net ________ and a ________ nation

At the current production point on a nation's production possibilities frontier, the marginal benefit of a slice of pizza is 500 tacos while the marginal cost of producing a slice of pizza is 750 tacos

For the nation to produce at the point of allocative efficiency, what should be done?

Price discrimination is possible, in part, because

A) costs of production vary as output increases. B) monopolies are regulated. C) monopolies don't profit maximize. D) the willingness to pay can vary among groups of buyers. E) monopolies face horizontal demand curves.