Test for Prediction Markets: They Say Obama, but Polls Say It’s Tied

Fact: According to the latest Rasmussen poll released Saturday July 12, and promptly headlined by the Drudge Report, “The race for the White House is tied. The Rasmussen Reports daily Presidential Tracking Poll for Saturday shows Barack Obama and John McCain each attract 43% of the vote.” Newsweek is reporting a similar result in its own poll, with Obama moving down and McCain up (“Obama, McCain in Statistical Dead Heat“), and other polls increasingly show a similarly close race.

Analysis: I’ve been tracking the growing divide between two quite different methods purporting to offer statistical predictive analysis for the November presidential election. Polls are saying one thing, but Prediction Markets are saying another. 

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