Are perfectly competitive markets allocatively efficient in the long run? A. Yes comma because firms produce at the lowest average cost possible. B. Yes comma because firms produce where the marginal benefit to consumers equals the marginal cost of production. C. No, because firms earn zero economic profits. D. No, because firms will not shut down unless price is less than the average variable cost of production. E. Both a and b.

Before contacting the news or print media about your business, what must you come up with first ? a. a media expertb. a big budgetc. a track recordd. a story angle

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

How are interest rates calculated by financial institutions? financial institutions generally calculate interest as (1) interest or (.