If isn’t just vertical integration. It’s also abuse of monopoly power. I’m sure the DoJ won’t have any trouble showing how much market share TM/LN have.

I think the real issue is the limited supply of tickets to the most popular shows. Supply and demand dictates that the prices for these limited goods be very high, yet social norms discourage artists from charging the true market value for their tickets (fans will rebel against their favourite artist for perceived greed). So TM provides an effective reputation-laundering service to the artists and collects a hefty fee for it. If the DoJ were to win their case and succeed in breaking up the TM monopoly then I bet the extra revenue would go to some other ticket brokers, not to the artist or into consumers’ pockets.

The Paramount Decrees way back in the 1940s/1950s: that's why Hollywood studios cannot produce movies and own the theaters which exhibit them. It's also similar to the (much more complex) reasons TV Service Providers (DirectTV, Spectrum, XFinity et. al) are separate from TV Networks, and why you don't see Disney trying to buy, say, DirectTV. Of course, streaming upended almost all of that.

DOJ won against Paramount et al. in 1949. Consent decrees were in place for over 70 years.

https://www.justice.gov/atr/paramount-decree-review

DOJ won against A&P in 1946 and again on appeal in 1949.

https://www.courtlistener.com/opinion/1473571/united-states-...

https://www.courtlistener.com/opinion/2311543/united-states-...

Yes.

https://en.wikipedia.org/wiki/Breakup_of_the_Bell_System

This is a most beautiful question. Perhaps the baby bells? That’s about all I can think of

Yes, against Hollywood. Before then you could only see a Fox movie at a Fox theater