2009.1 (view changes)
Updated June 6, 2009:

Markets

AJAX chart updates

performance increase

Experiments

short sales with reserves

slider for judge input

judging can be limited by timer

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Zocalo is a toolkit for building prediction markets, markets in securities that pay out depending on outcomes of future events. They provide estimates of the likelihood of specific outcomes that are more reliable than other sources of predictions. more

The Zocalo Project Lead is Chris Hibbert.

• Visit the Zocalo project page at SourceForge.
• Want to help? Read our development plans.
• What does Zocalo mean?

Chris Hibbert's articles on Prediction Market mechanisms
• PM intro: basic formats (2005-12-30)
• PMs with Open-ended Prices (2006-01-05)
• Looking at Both Sides (2006-04-17)
• Book and Market Maker (2006-04-28)
• Liquidity in N-Way claims (2006-07-19)
• Continuous Outcomes using Bands and Ladders (2006-09-20)
• Integrating Book Orders and Market Makers (2007-01-10)
• Conditional and Combinatorial Betting (2007-03-06)
• Market Makers for Multi Outcome Markets(2007-09-10)