Sports teams do better in states without income taxes

In theory, one would expect higher after tax salaries to attract better players.  The forces behind this are the same that lead to compensating differentials in labor markets.  Evidence supports theory:

The income tax rate effect varies by league, with the largest effect in professional basketball, where teams in states without income tax win 4.5 more games each year relative to high-tax states.

HT:  Marginal Revolution