A 2004 study by the Cato Institute in Washington analyzed 37 U.S. cities over 30 years .
A 2004 study by the Cato Institute in Washington found that not one of them experienced an economic boost related to the presence of a professional sports franchise .
A 2004 study by the Cato Institute in Washington analyzed 37 U.S. cities over 30 years and found that not one of them experienced an economic boost related to the presence of a professional sports franchise .