The difference between exports and imports of goods is the

The additional cost resulting from a small increase in some activity is called the

A) marginal cost. B) diminishing returns of the activity. C) opportunity cost. D) marginal benefit.

As practiced by book publishers, versioning involves first selling the hardcover edition of a book and then switching to a paperback edition to sell additional copies. As such, this is an application of second-degree price discrimination

Indicate whether the statement is true or false