________ are costs that, once committed, can never be recovered and should not affect current and future production costs

The "A" in the neoclassical production function incorporates

a. new inventions. b. changes in efficiency. c. more productive capital. d. more efficient labor organization. e. all of the above.

Which of the following is best characterized as a public good?

A) a public library B) a church C) primary education D) police protection