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  "path": "/t/educational-play-money-prediction-markets/13838#post_3",
  "publishedAt": "2026-03-24T09:50:47.000Z",
  "site": "https://discourse.haskell.org",
  "textContent": "IHP web framework was more important and helpful for me in this project than Haskell itself, as it allowed to be very pragmatic and gloss over all the difficulties the newcomers to Haskell usually face.\n\nAs for the prediction markets themselves, you can find a lot of info online how they work. This project specifically uses the Robin Hanson Logarithmic Market Scoring Rules (LMSR) for the automatic trading and always available liquidity - essential for the small play-money implementation. Concerning the real money prediction markets - there is a lot of controversy in it and their legality is still not fully solved even if they exist for more than 20 years already. Insider trading is the biggest concern, I would say - it’s too easy to manipulate markets when you can influence the event itself. And crypto involvement does not help with that either. That’s why play-money markets have their value too - they have too little incentives to be manipulated (no real monetary gain), but are good means to express your believes about the future events and help to elicit the common believes of many people very well.",
  "title": "Educational Play-Money Prediction Markets"
}