This paper devises a methodology to compare the accuracy of prediction markets and polls. The data of the Exchange of Future Events (xFuture) for Taiwan’s 2006 mayoral elections and 2008 presidential election show that the prediction markets outperform the opinion polls in various indices of...

This paper examines the degree to which individuals tend to be overconfident in their judgements and identifies the implications for those trading in prediction markets. The findings from laboratory-based psychological studies of overconfidence are compared and contrasted with those from...