In an article about election forecasting, the New Scienist mentions the PollyVote.
"But why not combine all of the methods mentioned above? That's the idea behind PollyVote, a model that predicts the result by combining forecasts based on economic and other factors, polls, prediction markets and a survey of academic experts. It was first trialled in the 2004 presidential race. In August of that year, when both polls and markets put John Kerry in the lead, the model was still predicting a victory for George W. Bush. On average, the model's errors were a third below those produced by the market. Since September 2007, when it started running for next month's election, it has never predicted a Republican victory."
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