Tag Archives: state polls

A graph with a data point for each state, with the horizontal axis representing the polling data and the vertical axis representing the Intrade contract price

Via Andrew Gelman On November 3, 2008:

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“Still, as noted, it was a good election for [the] prediction markets and another piece of evidence of their superiority over the pundit[s] (and at least parity with the poll).”

Dixit Nigel Eccles in a comment. – at least parity with the poll – I agree with the above. – their superiority over the pundits – What documented evidence do you have about that, mister the cocky entrepreneurial Scotsman? John … Continue reading

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The 2 links you should follow, first thing, this Monday morning

- A portrait of Nate Silver in the New York Times. – Jed Christiansen’s post-mortem on the 2008 US presidential elections. I’ll have many remarks to add to his analysis.

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Is Iowa Electronic Markets’ George Neumann really a gentleman?

George Neumann is ducking the objections that was put under his very nose. Bad.

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It wasn’t about the predictions.

Let’s not confuse media visibility with utility. Aside from the depressed Obama-to-win prices on one exchange, prediction market and polling aggregation results for the 2008 election were essentially the same using squared errors. Despite his insane schematics, Emile Servan-Schreiber has … Continue reading

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3 links you can’t afford to miss

- How Companies Are Using IT To Spot Innovative Ideas – (3 pages) – by Information Week’s David Greenfield – 2008-11-10 – An interview with InTrade’s Chad Rigetti and John Delaney – 2008-11-xx — Much smarter than the idiotic interview … Continue reading

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“Long after Intrade gave a 99% chance for an Obama victory, CNN announced him as the winner, predictably at 11pm EST on-the-dot.”

Because CNN wanted a 100% certainty, Jason. You are mixing up oranges and bananas, here.

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2008 US presidential elections

- InTrade versus Nate Silver – The New York Times’s analysis on the (almost) final results. UPDATE: Electoral-Vote.com on their accuracy.

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Nate Silver “killed” InTrade.

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The 2008 US presidential election was “pretty close”, and Nate Silver’s state poll aggregation “pretty much nailed” it.

The pretty good Andrew Gelman: – This is a (not yet expired) static chart from InTrade on whether the RCP poll aggregation have been accurate:

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