We investigate the occurrence of bubble-crash pricing patterns in laboratory financial markets with a mixture of experienced and inexperienced traders. We find that even with a minority of experienced traders, bubbles are substantially abated.

Clock rule changes were introduced in the 2006 season with the goal of reducing the average duration of the game; these changes were reversed in 2007. In addition, in 2007 the kickoff rule was changed to create more excitement and potentially more scoring. We examine what happened to actual and...