Thanks to what’s become known as the Bork doctrine, they matter a lot less than they used to. Since at least the 1980s, regulators and courts have favored a ver

Thanks to what’s become known as the Bork doctrine, they matter a lot less than they used to. Since at least the 1980s, regulators and courts have favored a very narrow idea of what counts as abuse of monopoly power, centered on consumer pricing issues. More general problems of market efficiency, preventing competition, monopsony, etc., have fallen by the wayside.