I'm guessing that Ticketmaster is provided most of the information they have, since they sell the tickets themselves... And I wouldn't be surprised if StubHub c

I'm guessing that Ticketmaster is provided most of the information they have, since they sell the tickets themselves... And I wouldn't be surprised if StubHub crowdsourced a lot of their stuff (people want to sell tickets, they'll try to post it on StubHub, and then StubHub just needs to validate it and then it has the info. You may want to ask someone at SeatGeek: www.seatgeek.com more about it, they are a YC startup and have a ton of data on that type of stuff...I feel like I may have read something on how they were able to gather data, but I can't remember where I got it.