Bates said:
The number is significant, the impact isn't.
Ok, you specifically said the opposite a little while ago.
Bates said:
I picked a rough number bit I'd bet it would be a minimum.
Except it almost certainly isn't and, again, if you wanted to read the academic literature on the subject that's out there then, as the quoted professor said, there's virtual consensus on the issue.
There are two fundamental errors you're making when calculating the number. One, the largest, is that you're comparing the revenue the Coyotes generate with nothing. As I said though, if the Suns new arena had 40 more nights to host concerts some of that revenue generated would be there anyway. So the impact of the Coyotes isn't going to be the gross total of money spent on Coyotes games it's going to be the net of Coyotes games vs. an alternative.
Which leads to the second mistake which is the idea that if the Coyotes left, people wouldn't just channel money elsewhere in the economy. Maybe people would eat out more, maybe they'd see more movies. They'd still be generating sales tax, just not at the arena. When Sports teams leave towns people don't decide to just stop having fun. Like the article says, some places have lost sports teams and seen sales tax revenues increase rather than decrease.