The Chron did an article over a year ago about this as well.
"Any new ownership group would be foolish not to look at San Francisco. In the mid-'80s, then-Warriors President Dan Finnane commissioned a study to determine the financial effect of moving to the city. The result was a 30 percent increase in value and revenue.
Today that number would only be higher. The sponsorship opportunities would be much better, the potential for selling premium tickets would be higher, and selling the naming rights to the new arena would be a cinch."
http://articles.sfgate.com/2010-03-2...-bay-at-t-park