In a prison, cigarettes are used as a medium of exchange. In this scenario, a cigarette is an example of:
a. near money

Barter occurs when you exchange

A) money for goods. B) goods for money. C) goods for other goods. D) one type of money, such as U.S. dollars, for a different type of money, such as Japanese yen.

Which of the following is a public good?

a. railroads b. genetic diversity c. a space station d. military aircraft e. commercial aircraft