Prediction markets

It's always interesting to read what other organisations are doing, and Google seems to do this sort of thing a lot and well.

Google’s Lunchtime Betting Game - New York Times

In the last two and a half years, 1,463 employees have made wagers with play money (Goobles, as in rubles) on questions like: will Google open a Russia office? will Apple release an Intel-based Mac? how many users will Gmail have at the end of the quarter?

Found here - The Obvious?: Prediction markets