The authors explain how, for the third time since its appearance in 2004, the PollyVote (www.polyvote.com) has demonstrated the value of combining forecasts to predict the two-party popular vote in U.S. presidential elections. Copyright International Institute of Forecasters, 2013

The Delphi technique is better than traditional group meetings for forecasting and has some advantages over another promising alternative to meetings, prediction markets. In this article, Kesten, Scott, and Andreas observe the increasing popularity of Delphi, describe the benefits of using this...

At PoliticalForecasting.com, better known as the Pollyvote, the authors combine forecasts from four sources: election polls, a panel of American political experts, the Iowa Electronic Market, and quantitative models. The day before the election, Polly predicted that the Republican ticket's share...

In 2004, Scott Armstrong, Alfred Cuzán, and Randy Jones launched the PollyVote to see if combining forecasts from different methods could improve the accuracy of election forecasting relative to individual forecasting methods. Scott had previously reported evidence that combining nearly always...

Foresight’s Spring 2011 issue included Robert Rieg and Ramona Schoder’s article “Corporate Prediction Markets: Pitfalls and Barriers” on the hurdles that must be overcome to properly establish a corporate prediction market (CPM). They enumerated four principal obstacles: (1) identifying...

In this new installment of the prediction markets column, Andreas Graefe summarizes the evidence he has uncovered on whether the design and implementation of a prediction market is worth the extra cost and effort involved, compared to a simple survey of the judgment of key individuals. Copyright...

With issue 17, Foresight begins a new column on prediction markets, an increasingly widespread mechanism for aggregating predictions from dispersed individuals. Column Editor Andreas Graefe will keep you apprised of new developments in the field and how likely these are to succeed. For an...

Andreas extends Carol Gebert’s discussion of the hurdles to implementation of prediction markets (issue 9) with his thoughts on defining the prediction event and the often delicate issue of the types of incentives needed to motivate trader participation in the market. Copyright International...

Choosing the right person for a given position is a highly complex task, J. Scott Armstrong yet experts believe that their experience allows them to do this well. Michael Lewis’s 2003 book Moneyball and the recent film based on the book provide a counterpoint, showing that the statistical...

No one came closer to predicting the outcome of the 2004 U. S. presidential election than the team at politicalforecasting.com, also called pollyvote.com. They tell us how they did it and whether they think they can do it again. Copyright International Institute of Forecasters, 2005