Some of anti trust historically has included too much higher of a barrier to effective entry which is how vertical monopolies are coherent as a concept. The iss

Some of anti trust historically has included too much higher of a barrier to effective entry which is how vertical monopolies are coherent as a concept. The issue isn't that owning a chain of iron mines, steel refineries, and factories using the steel stop anyone from running one or their own chains of those things but that to be a competitor a massive amount of capital is required. Effectively creating say an effective hundred million dollar moat to be competitive. In which case the investment might not even be worth the revenue earned as returns diminish as it is either duplicate the production of the leader to match economies of scale or lose by produce more expensive commodities. I don't quite agree with it philosophically (vertical intergration done right boosts efficency for everyone and done wrong only hurts themselves making it ironically procompetitive for those who don't make the same mistakes) but I can see the logic behind it.