Shane Shellenbarger sent me this link to an article that seeks to answer the question, "Why Do All Movie Tickets Cost the Same?" My guess is it's mainly Reason #2 in the article — theaters don't want you waiting for them to lower prices later on — and perhaps a fear that it'll make the higher priced tix feel like gouging. They think the customers will think, "Hey, it costs them to same to have me sit in Theater 1 as it does to sit in Theater 6. There's no reason they have to charge me more!" Yeah, I know that's not utterly logical but merchants cater to a lot of consumer notions that aren't logical.