Chapter 1

The wisdom of crowds

Chapter 2

Decentralized crystal balls

Chapter 3

Rewriting the front page

Chapter 4

Beyond the final whistle

Ch 1 · The wisdom of crowds
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futura The Iowa Electronic Markets used real money to predict political elections.

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futura Prediction markets turn collective beliefs into fluctuating probability scores.

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Crowd Oracle
BETA

futura Place bets on future events to discover how prediction markets shape news and sports.

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We only abandon our biases when being wrong has a cost.

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Glossary
prediction market (noun)
A speculative market created for the purpose of trading contracts based on the outcomes of future events. The University of Iowa's 1988 Electronic Markets proved that collective trading can outperform traditional political polls.

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Fun Fact

Crowd wisdom: In 1906, statistician Francis Galton found that the average of 800 guesses for a prize ox's weight was within one pound of its actual weight.

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Quiz

In what year did economists at the University of Iowa launch the first modern academic prediction market?

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Quiz

Which famous economist argued in 1945 that decentralized knowledge is best coordinated through market prices?

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Quiz

Which publication's massive straw poll in the 1920s began to replace betting odds in newspaper headlines?

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Quiz

If a prediction contract for a team winning the championship is trading at 35 cents, what does the market estimate their chance of winning to be?

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Quiz

In a standard prediction market, what is the maximum payout of a winning contract when it resolves?

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Quiz

What is the primary reason prediction markets are often more accurate than traditional public opinion polls?

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Quiz

During which period did informal, high-volume election betting markets operate openly on Wall Street?

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Quiz

Why did the Iowa Electronic Markets limit individual trader deposits to a maximum of $500?

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Gossip

Would you trust a crowd of strangers over a single expert?

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