Prediction Markets: A new Special Interest Group on forecastingprinciples.com

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The marketsforforecasting.com Special Interest Group provides a resource for researchers and practitioners who are interested in the field of prediction markets.

In keeping with the objectives of forecastingprinciples.com, this SIG will present research findings that support evidence-based principles. In particular, the site covers research that provides guidelines, prescriptions, rules, conditions, action statements, or advice about what to do in given situations.

The current site is a beta-version. To further develop the content, we ask for your contributions!

The material for this special interest group is maintained by Andreas Graefe. Please contact him for further information, and with corrections, additions, or suggestions for these pages.

How BetFair markets are settled in the situation where their integrity team are unhappy about some aspect of the betting on that event

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If suspicious betting is detected then the winnings of the specific accounts in question are frozen until such time as BetFair have had the chance to investigate and determine one way or the other. That has no effect on BetFair&#8217-s ability to settle the market for every other customer. If one trader has placed a bet on a match in good faith, that trader&#8217-s bet wins, and there&#8217-s a subsequent investigation, there is no reason whatsoever to disadvantage that trader by withholding settlement, particularly as a full investigation could take weeks.

That applied for the Hernandez v Brezezicki match.

Prediction Markets in the Classroom: Inkling Markets

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hile prediction markets have been in the spotlight this year, they are still unfamiliar to many folks. As one small step towards improving their visibility, along with my colleague James Lemieux I ran a prediction market at the University of Kansas School of Business. The markets ran for three and a half months and almost all traders were undergraduate business majors (you can see the very end stages of the market at: http://kufin400.inklingmarkets.com, username: myfoxkc and password: myfoxkc).

These markets were quite popular. The 475 traders made over 27,000 transactions in the 139 available markets. As a matter of reference, that is about 200 transactions per market while in Google&#8217-s market this ratio is 260.

There was a mix of both socially redeeming topics (issues of interest to the Business School such as how many internships the undergrads would get this school year) and others designed to attract interest (politics, sports, entertainment, finance). I was surprised to see that passions&#8211- and trade volume&#8211- ran quite high even in the more serious markets. For example, one contract&#8217-s expiry was based on whether the XM-Sirius merger would be consummated by March. When the DOJ announced its approval at the end of that month, there was only a small price increase. As the comments below suggest, this was not because the traders were asleep at the wheel but rather because they had a good understanding of the regulatory environment.

Inkling Markets provided the platform for our markets (if you are unfamiliar with Inkling, they have active public markets which you can sample). Inkling&#8217-s software and support is really ideal for classroom markets. There are nice features for both the people running the markets (James and I) as well as for traders (the students).

For the market admin:

– it is a snap to set-up and administer new contracts

– Adam Siegel and Nate Kontny are very responsive to questions, often responding within the hour

For traders:

– an intuitive trade interface, which is accessible even for those without experience with financial markets (though this can be a drawback if you would also like students to become familiar with order books)

– lots of goodies (customizable profile pages, market-specific discussion boards, graphs) leads students to visit the market a lot

– the daily/weekly top traders list encourages participation

I would strongly recommend others give prediction markets in the classroom a try. I found them to be both a great pedagogical tool and also one which the students really, really like. Students learned first hand about the role of information discovery as well as the biases often seen in prediction markets (though I will add it was difficult to illustrate the home town bias given the success of the athletic teams at my school this year). Feel free to get in touch with me if you have questions about how to set-up your own classroom markets.

Third Workshop on Prediction Markets, July 9 in Chicago

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Please join us at the Third Workshop on Prediction Markets, in Chicago on the afternoon of July 9, 2008. We plan academic talks, an industry panel, and open discussion. Participation is open to anyone, and we hope to be as flexible as possible in allocating speaking time. See the workshop website or the full Call for Contributions and Participation for details.

eLab eXchange Launches Web of Misery

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The eLab eXchange has just opened &#8220-The Web of Misery,&#8221- a competitive forecasting tournament hosted by Newsfutures, with 10 markets that reflect new online indicators of economic distress. Come and give it your best shot – forecast just how bad you think the economy is going to get in the next few months! One of the markets is reproduced above.

During periods of economic hardship, conventional wisdom suggests that some people tend to increase their level of certain behaviors, for example, they may &#8220-cling to guns or religion,&#8221- or perhaps turn to alcohol or gambling in an attempt to relieve any pressures they may be feeling about a &#8220-rough patch.&#8221- Additionally, the skyrocketing costs of food, health care and gas, not to mention the real estate downturn, suggest that, in general, many consumers will become more careful about how they spend their hard-earned dollars.

The Web of Misery captures 10 of these behaviors and let&#8217-s consumers forecast their impact. You can try your hand at judging the impact of the economic slowdown at eLab eXchange today!

Previous blog posts by Donna Hoffman:

  • The eLab eXchange Has Some Fun With Online Shopping This Holiday Season.
  • The Consumer Behavior of Prediction Markets

Who is behind the CFTCs request?

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People close to the CFTC say that one reason this is coming now is that the Chairman (who will be retiring soon) wants a legacy &#8212-something he leaves behind that is innovative and that he can be known for pioneering. If that&#8217-s the case, it means that nobody is pressuring them.

Signed: Deep Throat

&#8230- in response to that.

InTrades Software Glitch? – [See Jason Ruspinis comment, at the bottom of the post.]

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Here is a beauty from InTrade, 12 hours ago: Bids and Asks at the same price. Looks like the &#8216-ol InTrade price-matching mechanism is working great.

Signed: Deep Throat

Editor&#8217-s Note: Here&#8217-s a new screen shot, taken this Saturday early morning (US Easter: 2:50 am).

Jason Ruspini:

Actually it’s working fine. This means the same trader has a bid and offer at the same price. Otherwise traders would be able to manufacture bogus volume by trading with themselves.

Deep Throat on the journalists fatigue for reporting on prediction markets

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When we recently talked to a MSM reporter for a major article, he/she specifically said he/she didn&#8217-t want to write about public prediction exchanges because &#8220-there is nothing new there,&#8221- and was even hesitant to write about the activities of certain private, high-tech companies because they already have a reputation for &#8220-trying anything.&#8221- If that attitude is prevalent among other journalists, there may already be a fatigue setting in which is why you saw very little interest in the latest WSJ article on political prediction markets. Thinking about the readership of the major business press, through several feature articles there is already an awareness about the basics. There is limited return in writing yet another: &#8220-people are trading on everything from housing futures to political candidates, isn&#8217-t that amazing?&#8221-

There also seems to be very little innovation coming from the major public exchanges. When&#8217-s the last time any of the major prediction exchanges did anything truly noteworthy with their platform that was worth writing about? […]

The novelty of it all is wearing off, the &#8220-wisdom of crowds&#8221- stories have been done, and the public exchanges are going to need to come up with Act II, either through innovation, new content strategies, or partnerships.

Who would you back, the market consensus or a book-writing pundit?

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'Bad Money' by Kevin Phillips

Tyler Cowen picks the market consensus over book-writing pundits:

Either the current market estimate of inflation is the best estimate available, or you know that it is wrong and you will be a very rich man. I find the former scenario more plausible.

Cowen is commenting on the Kevin Phillips book, Bad Money, recently out.

Of course book authors may be wary of going directly into the financial markets to wager their hard earned cash, which is why I have advocated prediction markets for pundits in which authors would have a chance to back their book-selling punditry with real money.

In Separating cheap talk from truly held beliefs, I wrote of political pundits with books:

Maybe they believe what they write, and would be willing to subsidize a prediction market out of their book royalties to demonstrate the strength of their convictions. Or how about the books from the current crop of U.S. presidential candidates—I wonder if these books contain any claims that are specific and substantive enough to be either true or false.

If such punditry-based prediction markets were common, mistaken-but-honest demagogues (those pundits who actually believe what they write, and are willing to stand behind it) would end up subsidizing more thoughtful analysts participating in the markets- correct honest demagogues would end up taking home larger financial rewards- and dishonest demagogues would dissemble, seek to avoid being pinned down on specific claims, and when pressed for actionable claims they would run and hide.

[Cross posted from Knowledge Problem]

La Sagesse Des Foules

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Good news this week for French-speaking Midas Oracle readers: The French version of Surowiecki&#8217-s book has at last been released. Here&#8217-s wishing it the success it deserves! Early reviews are very positive: One reviewer writes poetically about &#8220-crowds so wise that they become revolutionary.&#8221- Cute, and telling: As the country celebrates the student uprisings of April-May 1968, when Mao&#8217-s little red book was a must read, Surowiecki&#8217-s manifesto is indeed perfectly timed to launch a new cultural revolution.

La Sagesse des Foules