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Accuracy of Combined Forecasts for the 2012 Presidential Election: The PollyVote
Journal article   Peer reviewed

Accuracy of Combined Forecasts for the 2012 Presidential Election: The PollyVote

Andreas Graefe, J. Scott Armstrong, Randall J. Jones and Alfred G. Cuzan
PS, political science & politics, Vol.47(2), pp.427-431
04/01/2014
Web of Science ID: WOS:000337726500034

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Abstract

We review the performance of the PollyVote, which combined forecasts from polls, prediction markets, experts' judgment, political economy models, and index models to predict the two-party popular vote in the 2012 US presidential election. Throughout the election year the PollyVote provided highly accurate forecasts, outperforming each of its component methods, as well as the forecasts from FiveThirtyEight.com. Gains in accuracy were particularly large early in the campaign, when uncertainty about the election outcome is typically high. The results confirm prior research showing that combining is one of the most effective approaches to generating accurate forecasts.

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