While combining forecasts is well-known to reduce error, the question of how to best combine forecasts remains. Prior research suggests that combining is most beneficial when relying on diverse forecasts that incorporate different information. Here I provide evidence in support of this...

The five-factor personality model is used to calculate personality scores of U.S. presidential candidates, based on how voters rated the candidates on 69 trait adjectives. These scores are then used to predict the election results from 1972 to 2012. In ten of the eleven elections, the candidate...

The “Issues and Leaders” model shows that aggregate votes for President in U.S. elections from 1972 to 2012 can be accurately predicted from people’s perceptions of the candidates’ issue handling competence and leadership qualities. For the past five elections, the model’s ex ante...

The “Issues and Leaders” model shows that aggregate votes for President in U.S. elections from 1972 to 2012 can be accurately predicted from people’s perceptions of the candidates’ issue handling competence and leadership qualities. For the past five elections, the model’s ex ante...

In the PollyVote, we evaluated the combination principle to forecast the five U.S. presidential elections between 1992 and 2008. We combined forecasts from three or four different component methods: trial heat polls, the Iowa Electronic Markets (IEM), quantitative models and, in the 2004 and...