The movement between the opening and closing of betting lines on sports events has been shown to contain valuable information. The purpose of this study is to search for the source of this valuable information. Changes in college football betting lines are examined with respect to information...

We adopt a power law framework to measure the concentration of daily trading among the different stocks on the US market. Our analysis of the trends of daily concentration over the last five decades reveals that trading concentration is lower on Mondays and the day after a long weekend. These...