Prediction Markets + Market Predictions = Collective Forecasting That Pays Off

Tag Archives: Eve Prob

Final InTrade v. Zogby Showdown Results

Superdelegate chicanery notwithstanding, Obama has won his party’s nomination, so my head-to-head contest between a major pollster (Zogby) and major prediction market (Intrade) will be coming to a close.
Unsurprising to those who know a little bit about the scholarship, economics, and/or track record of prediction markets, the traders of Intrade provided us much better data [...]

Intrade beats Zogby on Super Tuesday

Both the prediction market and the pollster called 5 of the 7 head-to-head contest winners, so it was mostly ties between them. But in the NJ Democratic primary and the California Republican primary, Intrade contracts pointed to the winner on election eve, while Zogby indicated a tie in NJ and Romney in California.

Standings
 
 
 
 

Wins
Losses
Ties
Pct
Contender
Avg Eve Prob

 
 
 
 
 
 

5
2
9
59.4%
Intrade
69.6%

2
5
9
40.6%
Zogby
39.2%

Contest-by-contest [...]

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