Event study methodology is a powerful procedure to quantify the impact of events and managerial decisions such as new product announcements on the value of a publicly traded company. However, for many events, appropriate financial data may not be available, either because suitable securities are...

This article compares the forecast accuracy of different methods, namely prediction markets, tipsters and betting odds, and assesses the ability of prediction markets and tipsters to generate profits systematically in a betting market. We present the results of an empirical study that uses data...

The application of Internet--based virtual stock markets (VSMs) is an additional approach that can be used to predict short-- and medium--term market developments. The basic concept involves bringing a group of participants together via the Internet and allowing them to trade shares of virtual...

Research in marketing examines concepts that deal with social interaction, for example opinion leadership and word-of-mouth. Two types of actors play key roles in social networks where social interaction takes place: actors who have a lot of contacts (so called hubs) and actors in bridging...