"Analyzing North American major sports leagues other than baseball, we find no break points in competitive balance time series corresponding to rule changes, the draft, free agency, salary caps, or labor disputes except for the 1998 basketball lockout. Some expansion and team relocation...

"Tax law revisions of 2004 altered the "roster depreciation allowance" enjoyed by pro sports team owners. Supporters claimed this would practically eliminate costly legal oversight by the IRS and, ultimately, increase owner tax bills. Government officials and leagues remained silent on team...