Prediction Markets as institutional forecasting support systems

Authors:
Gerrit H. Van Bruggen;Martin Spann;Gary L. Lilien;Bernd Skiera
Affiliations:
Rotterdam School of Management, Erasmus University, P.O. Box1738, 3000 DR Rotterdam, The Netherlands;Ludwig-Maximilians-University (LMU), Geschwister-Scholl-Platz 1, 80539 Munich, Germany;Penn State, 484 Business Building, University Park, PA 16803, USA;Goethe-University Frankfurt, Grüneburgplatz 1, 60323 Frankfurt am Main, Germany
Venue:
Decision Support Systems
Year:
2010

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Abstract

An attractive feature of Prediction Markets (PMs) is that they provide economic incentives for informants to share unique information. It is unclear whether PMs are appropriate for applications with few knowledgeable informants as is the case for most institutional forecasting tasks. Hence, we compare the performance of small PMs with traditional judgment-based forecasting approaches. Our results show that forecasts from small PMs outperform traditional approaches in settings of high information-heterogeneity (i.e., where the amount of unique information possessed by informants is relatively high) and are no worse in settings of low information-heterogeneity.