Rockonomics

"Early on in the entertainment industry, it’s in the interest of the business to think of themselves as throwing a party, not selling a product. I think they attract more of a following that way," he said.

"But over time, the industry takes more the form of a market and is driven by market forces. The Superbowl initially felt like it was rewarding its fans. But then it becomes established and the League finds it in its interest to push up prices."

That is Alan Krueger, from this BBC article on his work on the economics of rock music.   Hat tip to EconBall blog.