Antitrust risks from vertical integration are usually _______. a. unrelated to the relative market power of the firm b. lower than those from horizontal integration c. higher than those from horizontal integration d. about the same as than those from horizontal integration Economists love auctions because a. they open the door to costly negotiations, with room for manipulation. b. they set the price for the item, avoiding costly negotiations. c. they maximize consumer surplus. d. they minimize producer surplus