The main difference between the three forms of market efficiency is that a. the definition of efficiency differs. b. the definition of excess return differs. c. the definition of prices differs. d. the definition of information differs. e. they were discovered by different people.

Which term refers to the cost that motivates an economic decision

What is the relationship between marginal external cost, marginal social cost, and marginal private cost? a. marginal social cost equals marginal private cost plus marginal external cost. b. marginal private cost plus marginal social cost equals marginal external cost. c. marginal social cost plus marginal external cost equals marginal private cost. d. marginal external cost equals marginal private cost minus marginal social cost. marginal external cost a. is expressed in dollars, so it is not an opportunity cost b. is an opportunity cost borne by someone other than the producer c. is equal to two times the marginal private cost d. is a convenient economics concept that is not real

What is the difference between secure bonds and naked bonds?