Bookmaker

Presidential Prediction Market Déjà vu        

Feelings of déjà vu from the spring of 2020 for political forecasters and gamblers stems not from another contentious election, hopeless gridlock in D.C., or even the same presumptive nominees, but from Donald Trump and Joe Biden, again, both trading below 50% on prediction markets like PredictIt.  Four years ago neither Trump nor Biden were […]

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Trump Indictment Bump

Weirdly reminiscent of how then-President Bill Clinton went up in the polls after the Monica Lewinsky scandal, former President Donald Trump received a bump in various prediction markets following both his Thursday, March 30th indictment and Tuesday, April 4th arraignment. But it wasn’t just the prediction markets.  In different Ipsos polls taken before and after

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Did Bookmakers & Prediction Markets fare that badly in the 2022 Senate races?

There has been some ridicule about prediction markets’ poor performance in the 2022 Senate elections, but the data for individual Senate races is less clear.  Below we look at the state-level forecasts for 2022 Senate races from the following sources: These 12 platforms are being compared in two different ways: Prices, probabilities, and odds were

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2022 U.S. Senate Forecasts & Markets One Week Out

The 2022 U.S. Senate Elections will be held in one week on Tuesday, November 8, 2022.  Below we’re comparing probabilities from forecast models, prediction markets, and bookmakers for the Republican candidate in the 35 Senate races on the ballot.  The table contains the win probabilities from: Two election forecasts (FiveThirtyEight &  Decision Desk HQ) Five

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How much did Nate Silver move the political gambling markets?

On Thursday, June 30th, FiveThirtyEight released its 2022 Senate Elections Forecast.  Nate Silver is the most famous election forecaster in the world, and it seemed likely that prediction markets and bookmakers would adjust to his model’s predictions.  We’re comparing the impact of FiveThirtyEight’s first public forecast by measuring the movement towards FiveThirtyEight’s state-level predictions on

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