Referring to Table 4.2, Box E should be filled with 

You choose to get a flu shot each fall and your roommate chooses not to get a flu shot. For your roommate, you getting a flu shot is a

A) positive externality. B) negative externality. C) transactions cost. D) property right.

Real money supply expresses the money supply in terms of real goods and services

Indicate whether the statement is true or false