If it is impossible or very costly to prevent someone from benefiting from a good even if the person does not pay for it, the good is

The Q-theory of investment was originally developed by

A) John Maynard Keynes. B) Dale Jorgenson. C) Paul Samuelson. D) James Tobin.

If the marginal private cost of producing one kilowatt of power in California equals five cents and the marginal social cost of each kilowatt equals nine cents, then the marginal external cost equals ________ per kilowatt

A) five cents B) nine cents C) four cents D) fourteen cents