Of Polls And Prediction Markets | Andrew Gelman | Statistical Modeling | 13th July 2016
Why prediction markets failed to predict Brexit. “In the past, traders followed the polls too closely and sent the prediction markets up and down. But now the opposite is happening. Traders are treating markets odds as correct probabilities and not updating enough based on outside information. Belief in the correctness of prediction markets causes them to be too stable. When new information comes in, it gets discounted. People are using the current prediction odds as an anchor”
