Which of the following would be considered income in kind?

A country's production possibilities will grow if it

a. produces more guns than butter. b. lowers its opportunity costs. c. makes more trade-offs. d. increases its resources.

Network externalities

a. explain why switching costs fall as the size of a network increases b. are the service-industry equivalent of natural monopolies in goods-producing industries c. are more important in the short run than in the long run d. help explain why monopolies often do not last for very long e. can explain the dominance of existing firms in some industries