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

@article{Graefe2014AccuracyOC,
  title={Accuracy of Combined Forecasts for the 2012 Presidential Election: The PollyVote},
  author={Andreas Graefe and J. Scott Armstrong and Randall J. Jones and Alfred G. Cuz{\'a}n},
  journal={PS: Political Science \& Politics},
  year={2014},
  volume={47},
  pages={427 - 431}
}
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… 

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References

SHOWING 1-10 OF 16 REFERENCES

Predicting Elections from the Most Important Issue: A Test of the Take-the-Best Heuristic

We used the take-the-best heuristic to develop a model to forecast the popular two party vote shares in U.S. presidential elections. The model draws upon information about how voters expect the

Forecasting the 2012 American National Elections

This symposium presents 13 articles forecasting the 2012 US national elections. Included in this collection are the eight national and one state presidential vote forecasting models published in PS:

Forecasting Elections from Voters' Perceptions of Candidates' Ability to Handle Issues

When deciding for whom to vote, voters should select the candidate they expect to best handle issues, all other things equal. A simple heuristic predicted that the candidate who is rated more

Improving Predictions using Ensemble Bayesian Model Averaging

EBMA improves prediction by pooling information from multiple forecast models to generate ensemble predictions similar to a weighted average of component forecasts, and increases the accuracy of out-of-sample forecasts relative to component models in three applications.

The Evolution of Election Polling in the United States

Public opinion polls have long played an important role in the study and conduct of elections. In this essay, I outline the evolution of poll- ing as used for three different functions in U.S.