Marco goes to the pet store to buy a dozen Koi fish for his new Koi pond. He is willing to pay $200 for the dozen fish, but buys them for a total of $140. Marco's consumer surplus from the purchase is

A Social Security system in which payroll taxes that workers and their employers pay in go directly to retirees and other beneficiaries is known as

A) a pay-as-you-go system. B) an individual-account system. C) a primary-deficit system. D) a social-lockbox system.

The term "free rider"

a. refers to the reduction of incentives for an individual to provide effort. b. describes the privatization of goods and property. c. refers to a situation in which resources are overused and quickly exhausted. d. describes people who did not pay for their ship travel to the colonial US because their relatives would pay their fares once they arrived.