I take a look, and presume that the numbers for each candidates on a given day should add up to make 100. The higher the number, the more probable an event will happen. (I just read 新手上路 | 常見問題--buttons at the bottom of home page--but can not understand a thing.)
(b) The Exchange of Future Events. The Center for Prediction Markets, National Chengchi University, May 7, 2010.
http://nccupm.wordpress.com/the-exchange-of-future-events/