Daily Archives: February 19, 2009

Prediction markets didnt revolutionize decision-making -and will never do. However, they are a nice condiment to the classic forecasting toolkit.

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I have spent several hours re-reading the 2004 AEI-Brookings book, &#8220-Information Markets&#8221- (by which they mean &#8220-prediction markets&#8221-). It is a collection of un-enlightening research articles &#8212-except for the IEM article, which is outstanding, both on the factual and theoretical sides.

In the conclusion of their introduction, Robert Hahn and Paul Tetlock wrote that they want their readers to contemplate the idea that prediction markets could make a &#8220-big&#8221- difference and &#8220-revolutionize public- and private-sector decision-making&#8221-. Well, 4 years later, it is clear that those big dreams didn&#8217-t pan out. Not a single mass media outlet has praised the public prediction markets for their work on the 2008 US presidential election (I am taking about a post-mortem analysis about Election Day, not the primaries). Not a single one. (Not even Justin Wolfers.) And the number of corporations using enterprise prediction markets is still minute. The thinkers who wrote this book (&#8220-Information Markets&#8221-) all made the mistake to put the emphasis on accuracy instead of efficiency. That was the foundation flaw. We should reset and reboot the field of prediction markets.

Previously: The truth about prediction markets

The HHS-Sebelius prediction market might be (yet) another case-in-point for documenting velocity.

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It is only today (February 19) that the New York Times emerges out of hibernation and headlines:

– Kansas Governor Seen as Top Choice in Health Post. &#8212- Gov. Kathleen Sebelius is emerging as President Obama’s top choice for secretary of health and human services.

Now, look at the red line in the HubDub chart below: the prediction markets nailed her since the beginning of February 2009.

Of course, a scientific comparison would have scrutinized more closely than I did all the news articles from the New York Times (and from other mass media). That&#8217-s what we are going to do with the &#8220-Open Institute Of Prediction Markets&#8220-. To this end, I will set up a portable and distributed &#8220-Prediction Markets Consortium&#8221- in the coming days. Then, I will try to anchor it in an institution of higher education, and, after that, I will try to gather support from think tanks and foundations. Not an easy task, but I know now that I can count on many prediction market people and companies. It should be an industry endeavor &#8212-and it should deliver results, in the end (demonstrating the social utility of the prediction markets by documenting velocity, and, from there, following a logical thread which I will talk you about later on).

PS: About velocity&#8230- Remember that we are about the prediction markets versus the mass media (The New York Times, The Times of London, NBC News, BBC News, etc.) &#8212-as opposed to the vertical media (Politico.com, Nate Silver&#8217-s blog, PoliticalBetting.com, etc.). The distinction is very important to keep in mind.

UPDATE: The only stuff I can find about Sebelius for HHS is that February 9 piece from the Associated Press (which didn&#8217-t get a mass audience since it was not-republished in the New York Times or other mass media), saying that she was &#8220-near the top&#8221- for the job. Well, &#8220-near the top&#8221- is not like saying she was &#8220-on top&#8221-.

UPDATE #2: The Sebelius story is picking steam in the mass media. See Nate Silver&#8217-s take.

ADDENDUM: Andrew Gelman tells me that he thinks that &#8220-the Associated Press is a mass medium. It is a cooperative organized by a bunch of newspapers.&#8221- I think that the AP news articles do indeed reach a big audience when they are re-published or cited in the mass media. But in the Sebelius case above, it was not the case.

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Previously: The truth about prediction markets

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Who will be the next nominee of the HHS, now that Daschle has withdrawn from consideration?

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No HHS contract on InTrade, BetFair or NewsFutures. :(