If LeBron James signs with the Bulls and plays in Chicago for six years, an estimate indicates that the two-time MVP could bring $2.7 billion to the city.

University of Illinois at Chicago economist John Skorburg says that in order to have that profound of an effect, James would have to win a few titles with the Bulls.

"Chicago has to convince LeBron that he can win championships there," says Paul Swangard, managing director of the University of Oregon's Warsaw Sports Marketing Center. "To maximize his off-court earning potential, it's all about getting rings."

Hosting 10 playoff games a year would generate nearly $5 million at the United Center on tickets, concessions, parking and other spending, Mr. Skorburg estimates.