The price of diamonds is high, in part because the majority of the world’s diamonds are controlled by a single firm. this is an example of a. a market failure caused by equality. b. a market failure caused by an externality. c. a market failure caused by market power. d. there is no market failure in this case.

The stock of grommet corporation, a u.s. company, is publicly traded, with no single shareholder owning more than 5 percent of its outstanding stock. grommet owns 95 percent of the outstanding stock of staple inc., also a u.s. company. staple owns 100 percent of the outstanding stock of clip corporation, a canadian company. grommet and clip each own 50 percent of the outstanding stock of fastener inc., a u.s. company. grommet and staple each own 50 percent of the outstanding stock of binder corporation, a u.s. company. which of these corporations form an affiliated group eligible to file a consolidated tax return?