Coordination doesnt need to be explicit, it can be circumstantial. And further, coordination isnt a requirement for a duopoly to simply exist and be anti free

Coordination doesnt need to be explicit, it can be circumstantial. And further, coordination isnt a requirement for a duopoly to simply exist and be anti free market. But to put the tin foil hat on, it would be naive to think the heads of these companies do not talk to their parallels. Its a pretty small club at the top. Obviously I do not have access to their calls and meetings and can prove none of this but I've worked with high up executives in other fields and know how the sausage is made even in more fragmented markets.