Much of the focus on consolidation in the broadband industry has focused on national market share. The problem is focusing solely on national market share implies that large companies are competing, when they don't. Just because there are multiple companies in an industry doesn't mean those companies compete. This is especially true in the broadband and wireless industries. As Susan Crawford explained
These companies don't have to agree in writing to carry this out or even raise their prices; they can simply, within their separate geographic and product territories, bundle and tie their services, buy up inputs that a competitor might need, and refuse to connect to competitors — among many other potential tactics. It's in their interest for these local monopolists to cooperate, because any defection would make the whole system crumble.
What Crawford is describing is parallel conduct, which is when companies that would otherwise compete create a monopoly-like setting without having to merge or coordinate operations. Parallel conduct in the broadband industry is not hypothetical. In 2011, Comcast and Time-Warner Cable sold parts of the wireless spectrum they owned in exchange for an agreement that Verizon would stop expanding its fiber...