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The Forrester executive summary:

The “wisdom of crowds” is capturing the attention of corporate strategists across the globe, and, as a result, many are now looking to prediction markets — speculative markets in which traders collectively predict future events — to generate collective intelligence. For enterprises, prediction markets bring unique value: They focus on the future, aggregate diverse information pools that can be applied to multiple decision-making domains, create streams of actionable data suitable for executive decision-making, and can often cut through corporate politics and pressures at lower cost than traditional forecasting methods. Market researchers will, however, need to have an active hand in the management of these mechanisms, ensuring strong management support, the right incentives for traders, and a focus on appropriate questions. When executed properly, the value to the enterprise is enormous; as a result, Forrester believes that prediction markets will ultimately find a permanent home in the market research toolbox.

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For information on hard-copy or electronic reprints, please contact the Client Resource Center at +1 866.367.7378, +1 617.617.5730, or resourcecenter –at– forrester –dot– com. We offer quantity discounts and special pricing for academic and nonprofit institutions.

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APPENDIX #1: Prediction Markets – DRM Review

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APPENDIX #2:

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Here is a list of companies that provide software for prediction markets:

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Inkling Markets – (MSR + AMM)

NewsFutures – (CDA + optional AMM + SR)

Xpree – (MSR + AMM)

Zocalo – (CDA + MSR + AMM) – (open-source)

Nosco – (CDA + MSR + AMM)

QMarkets – (MSR + AMM)

Ask Markets – (MSR + AMM)

Exago Markets – (CDA + optional AMM)

Gexid – (?)

ProKons – (?)

Spigit – (?)

HSX Virtual Markets – (Virtual Specialist + AMM)

HubDub – (MSR + AMM) – (not licensed)

Yahoo!‘s Prediction Exchange – (MSR + AMM + DPMM) – (not licensed)

Google‘s Prediction Exchange – (CDA) – (not licensed)

MicroSoft PredictionPoint – (MSR + AMM) – (not licensed)

InTrade – (CDA + AMM for play money) – (not licensed)

TradeSports – (CDA + AMM for play money) – (not licensed)

Iowa Electronic Markets – (CDA) – (not licensed)

HedgeStreet – (CDA) – (not licensed)

TradeFair – (CDA) – (not licensed)

BetFair – (CDA) – (not licensed)

Trading Technologies International – (CDA) – (not for event derivatives)

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Here’s a list of prediction market consultants:

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Robin Hanson – (George Mason University, Virginia, U.S.A.)

• Robin Hanson does prediction market consulting work, and have no exclusive arrangements.
• “I’m more interested in helping groups that want to add lots of value to big decisions, versus groups that just want to dabble in a new fad.”

Inkling – URL: Inkling Markets – (Chicago, Illinois, U.S.A.)

• Adam Siegel
• Nathan Kontny

NewsFutures – (Maryland, U.S.A. & Paris, France, E.U.)

• Emile Servan-Schreiber — Post Archive at Midas Oracle
• Maurice Balick

Xpree – (California, U.S.A.)

• Mat Fogarty

Chris Hibbert – (California, U.S.A.)

• Chris Hibbert (Software architect / Zocalo project manager) — Post Archive at Midas Oracle
• Chris Hibbert’s personal website — Chris Hibbert’s personal blog —
• Chris Hibbert’s CommerceNet profile — (His stint there ended in mid 2006.)

Justin Wolfers – (University of Pennsylvania’s Wharton Business School, Pennsylvania, U.S.A.)

• Justin Wolfers takes on prediction market consulting work.
• The prediction market industry is “a case where the interaction between firm practice and academic research are reasonably close.”

Koleman Strumpf – (University of Kansas, Kansas, U.S.A.)

• Koleman Strumpf — Post Archive at Midas Oracle
• Koleman Strumpf can be approached to consult on prediction market projects.
• “Prediction markets help harness the knowledge of diverse groups. They have great potential as a tool for industry.”

Nosco – (Danemark, E.U.)

• Jesper Krogstrup
• Oliver Bernhard Pedersen

Qmarkets – (Israel)

• Noam Danon

Ask Markets – (Greece, E.U.)

• George Tziralis — Post Archive at Midas Oracle

HP Services & HP Labs – (U.S.A.)

• Predicting the future –with games — Introductory article
• Information Dynamics Lab — Internal prediction markets
• BRAIN – (Behaviorallly Robust Aggregation of Information in Networks) — Scoring Rules (i.e., non-trading technique)
• Bernardo A. Huberman – Bernardo Huberman – Senior Fellow & Director
• Kay-Yut Chen -
• Google Search for “prediction markets”

Hollywood Stock Exchange (HSX) & HSX Research – (L.A., California, U.S.A.)

• Prediction market consultancy firm
• Movie business

IntelliMarket Systems – (L.A., California, U.S.A.)

• Charles R. Plott – Charles Plott – (CalTech Inst., California, U.S.A.)

Gexid – Global Exchange for Information Derivatives – (Germany, E.U.)

• Bernd Ankenbrand — Post Archive at Midas Oracle

ProKons – (Germany, E.U.)

• Peter Gollowitsch

Exago Markets – (Portugal, E.U.)

• Pedro Da Cunha

NimaniX – (Israel)

• Elad Amir (CEO), Littal Shemer Haim (VP Business development), David Shahar (VP R&D)

Michael Giberson – (Texas, U.S.A.)

• Michael Giberson (Energy Economist – Center for Energy Commerce, Rawls College of Business, Texas Tech University) — Post archive at Midas Oracle
• Knowledge Problem – Blog on economics, energy policy, more.

Other Consulting Firms

McKinsey – (U.S.A.)

• Google Search for “prediction markets”
• The Promise Of Prediction Markets – by McKinsey – 2008-04-XX

Accenture – (U.S.A.)

• Google Search for “prediction markets”

Gartner – (U.S.A.)

• Google Search for “prediction markets”

Forrester – (U.S.A.)

• Google Search for “prediction markets”
• Prediction Markets: Wisdom Of The Crowd Comes To The Enterprise. – 2008-07-14

The Boston Consulting Group – (U.S.A.)

• Google Search for “prediction markets”

CapGemini – (U.S.A.)

• Google Search for “prediction markets”

KPMG – (U.S.A.)

• Google Search for “prediction markets”

Price Waterhouse Cooper – (U.S.A.)

• Google Search for “prediction markets”

Ernst & Young – (U.S.A.)

• Google Search for “prediction markets”

Deloitte – (U.S.A.)

• Google Search for “prediction markets”

IBM – (U.S.A.)

• Google Search for “prediction markets”

EDS – (U.S.A.)

• Google Search for “prediction markets”

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Check that CFM page for updates. And contact me so I can make additions to the list. (I’ll then re-publish that updated list on Midas Oracle.)

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• Michael Abramowicz – Michael B. Abramowicz – (Law School, George Washington University, Washington, D.C., U.S.A.) — Post Archives at Midas Oracle
• Bernd H. Ankenbrand – Bernd Ankenbrand – (Lecturer, Witten/Herdecke University, Germany, E.U.) — Post Archives at Midas Oracle
• James Annan – (Global Environment Modelling Research Program, Frontier Research Center for Global Change, Japan)
• Werner Antweiler – (UBC Election Stock Market, Sauder School of Business, University of British Columbia, Vancouver, Canada)
• Kenneth J. Arrow – Kenneth Arrow – (Economics Department, Stanford University, California, U.S.A.)
• Tom W. Bell – Tom Bell – (Law School, Chapman University, California, U.S.A.) — Post Archives at Midas Oracle
• Joyce E. Berg – Joyce Berg – Profile – (Iowa Electronic Markets, Accounting, Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)
• Richard Borghesi – (Finance, Texas State University at San Marcos, Texas, U.S.A.) — Post Archives at Midas Oracle
• Kay-Yut Chen – (Information Services & Process Innovation Lab, HP Labs, HP, California, U.S.A.)
• Yiling Chen – (Micro-Economic and Social Systems, Yahoo! Research Labs, New York, U.S.A.) — Post Archives at Midas Oracle
• Eric Crampton – (Department of Economics, University of Canterbury, New Zealand) — Post Archives at Midas Oracle
• Ely Dahan – (Marketing, Anderson School, University of California at Los Angeles, Los Angeles, California, U.S.A.)
• Anita Elberse – (Marketing, Harvard Business School, Harvard University, Massachusetts, U.S.A.)
• Leslie R. Fine – Leslie Fine – (Information Dynamics Lab, HP Labs, California, U.S.A.)
• Gary William Flake – Gary W. Flake – Gary Flake – (MicroSoft, U.S.A.)
• Robert Forsythe – (Dean, College of Business Administration, University of South Florida, Florida, U.S.A.) — Previously: (Economics, Iowa Electronic Markets, Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)
• Lance Fortnow – Lance J. Fortnow – (Department of Electrical Engineering and Computer Science, McCormick School of Engineering, Northwestern University, Illinois, U.S.A.)
• Keith Jacks Gamble – Keith Gamble – (Economics (University of California at Berkeley) – California, U.S.A. — Post Archives at Midas Oracle
• Michael Gorham – (IIT Center for Financial Markets, Stuart School of Business, Illinois Institute of Technology, Illinois, U.S.A.) — Previously: (CFTC)
• Thomas S. Gruca – Thomas Gruca – Profile – (Iowa Electronic Markets, Marketing, Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)
• Refet Gurkaynak – (Department of Economics, Bilkent University, Turkey)
• Friedrich August Von Hayek — R.I.P. — The market as an information aggregation tool: The Use of Knowledge in Society —
• Robert W. Hahn – Robert Hahn – (Executive Director, Reg-Markets Center, American Enterprise Institute, Washington, D.C., U.S.A.) — Post Archives at Midas Oracle
• James D. Hamilton – James Hamilton – (Department of Economics, University of California at San Diego – California, U.S.A.) — Post Archives at Midas Oracle
• Robin Hanson – Robin D. Hanson – (Economics, James M. Buchanan Center, George Mason University, Virginia, U.S.A.) — Post Archives at Midas Oracle
• M. Todd Henderson – (Law School, University of Chicago, Chicago, Illinois, U.S.A.)
• Chris Hibbert – (Software Architect, Zocalo Project Manager, California, U.S.A.) — Post Archives at Midas Oracle
• Charles Holt – Charles A. Holt – (Department of Economics, University of Virginia, Virginia, U.S.A.)
• Bernardo A. Huberman – Bernardo Huberman – (Social Computing Lab, HP Labs, California, U.S.A.)
• Frédéric Koessler – (Economics, Centre Nationale de la Recherche Scientifique, France, E.U.)
• Anthony M. Kwasnica – Anthony Kwasnica – (Business Economics, Department of Insurance and Real Estate, Smeal College of Business Administration, Penn State University, Pennsylvania, U.S.A.)
• Nicolas Lambert – (Department of Computer Science, Stanford University, California, U.S.A.)
• John O. Ledyard – John Ledyard – (Economics and and Social Sciences, Division of Humanity and Social Sciences, California Institute of Technology, California, U.S.A.)
• Andrew Leigh – (Economics, Research School of Social Sciences, Australian National University, Australia)
• Steven Levitt – Steve Levitt – Steven D. Levitt – (Economics, Director of the Becker Center on Chicago Price Theory, Graduate School of Business, University of Chicago, Illinois, U.S.A.)
• Saul Levmore – (Law School, University of Chicago, Illinois, U.S.A.)
• Robert E. Litan – Robert Litan – (Vice President for Research and Policy, Kauffman Foundation, Kansas City, Missouri, U.S.A.)
• Thomas W. Malone – Thomas Malone – Tom Malone – (MIT Center for Collective Intelligence, Management, MIT Sloan School of Management, Massachusetts Institute of Technology, Massachusetts, U.S.A.)
• Charles F. Manski – Charles Manski – (College of Arts and Sciences, Norwestern University, Illinois, U.S.A.)
• Adam Meirowitz – (Department of Politics, Princeton University, New Jersey, U.S.A.)
• Paul Milgrom – (Department of Economics, Stanford University, California, U.S.A.)
• Tracy Mullen – (Information Sciences and Technology, Penn State University, Pennsylvania, U.S.A.)
• Forrest Nelson – Profile – (Iowa Electronic Markets, Economics, Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)
• George R. Neumann – George Neumann – Profile – (Iowa Electronic Markets, Economics, Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)
• Ryan Oprea – Profile – (Director of the LEEPS laboratory, Economics, University of California at Santa Cruz, California, U.S.A.)
• Gerhard Ortner – (University of Applied Sciences, Austria, E.U.)
• Marco Ottaviani – (Management and Strategy, Kellogg School of Management, Northwestern University, Illinois, U.S.A.) – Formerly: (Economics Department, London Business School, United Kingdom, E.U.) — Post Archives at Midas Oracle
• David Paton – (Industrial Economics, Business School, Nottingham University, United Kingdom, E.U.)
• David M. Pennock – David Pennock – (Principal Research Scientist, Micro-Economic and Social Systems, Yahoo! Research Labs, New York, U.S.A.) — Post Archives at Midas Oracle
• Charles R. Plott – Charles Plott – (Economics and and Social Sciences, Division of Humanity and Social Sciences, California Institute of Technology, California, U.S.A.)
• David Porter – (Economics and Finance, Chapman University, California, U.S.A.)
• Todd Proebsting – Todd A. Proebsting – (Microsoft & University of Arizona, U.S.A.)
• Russ Ray – (Finance, College of Business, University of Louisville, Kentucky, U.S.A.)
• Daniel Reeves – (Micro-Economic and Social Systems, Yahoo! Research Labs, New York, U.S.A.) — Post Archives at Midas Oracle
• Paul W. Rhode – Paul Rhode – (US Economic History, College of Management, The University of Arizona, Arizona, U.S.A.) – Formerly: (University of North Carolina, North Carolina, U.S.A.)
• Thomas A. Rietz – Thomas Rietz – Profile – (Iowa Electronic Markets, Finance, Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)
• Richard Roll – (University of California at Los Angeles, Los Angeles, California, U.S.A.)
• Thomas W. Ross – Thomas Ross – (UBC Election Stock Market, Sauder School of Business, University of British Columbia, Vancouver, Canada)
• Rahul Sami – (School of Information, University of Michigan, Michigan, U.S.A.)
• Sam L. Savage – Sam Savage – (Consulting Professor, Stanford U., California, U.S.A.) — Post Archives at Midas Oracle
• Thomas C. Schelling – Thomas Schelling – (Economics, School of Public Affair, University of Maryland, Maryland, U.S.A.)
• Emile Servan-Schreiber – (NewsFutures, New York City, New York, U.S.A. & Paris, France, E.U.) — Post Archives at Midas Oracle
• Robert J. Shiller – Robert Shiller – Profile – (Economics, Yale University, Connecticut, U.S.A.)
• Bernd Skiera – (Electronic Commerce, Goethe University, Germany, E.U.)
• Vernon L. Smith – Vernon Smith – (Economics, Economic Science Institute, Chapman University, California, U.S.A.)
• Erik Snowberg – (Stanford University, California, U.S.A.) — Soon at CalTech
• Peter Norman Sorensen – (Finance, Department of Economics, University of Copenhagen, Denmark, E.U.)
• Martin Spann – (Marketing and Innovation, University of Passau, Germany, E.U.)
• Koleman Strumpf – Koleman S. Strumpf – (Economics, School of Business, University of Kansas, Kansas, U.S.A.) – Formerly: University of North Carolina, North Carolina, U.S.A.) — Post Archives at Midas Oracle
• Cass Sunstein – Cass R. Sunstein – (Law School, University of Chicago, Chicago, Illinois, U.S.A.)
• James Surowiecki – (The Wisdom Of Crowds) – (New York, U.S.A.)
• Paul C. Tetlock – Paul Tetlock – (Finance, Business School, University of Texas at Austin, Texas, U.S.A.) — Post Archives at Midas Oracle
• Philip Tetlock – Philip E. Tetlock – (Leadership, University of California at Berkeley, California, U.S.A.)
• Hal R. Varian – Hal Varian – (Chief Economist, Google, California, U.S.A.) — Formerly: (Haas School of Business, Department of Economics, University of California at Berkeley, California, U.S.A.)
• Dorina Tila – (Economics, George Mason University, Virginia, U.S.A.)
• Leighton Vaughan-Williams – (Economics and Finance, Business School, Nottingham Trent University, United Kingdom, E.U.)
• Michael Wellman – Michael P. Wellman – (Computer Science and Engineering, University of Michigan, Michigan, U.S.A.)
• Justin Wolfers – Justin J. Wolfers – (Business and Public Policy, Wharton Business School, University of Pennsylvania, Pennsylvania, U.S.A.) — Post Archives at Midas Oracle
• Eric Zitzewitz – Eric W. Zitzewitz – (Economics, Dartmouth College, Massachusetts, USA) – Formerly: (Stanford University, California, U.S.A.) — Post Archives at Midas Oracle

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(with thanks to Chris Hibbert of Zocalo)

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Iowa Electronic Markets – (IEM) – (Henry B. Tippie College of Business, University of Iowa, Iowa, U.S.A.)

Interdisciplinary Center for Economic Science – (ICES) – (George Mason University, Virginia, U.S.A.)

Economic Science Institute – (ESI) – (Chapman University, California, U.S.A.)

HP Labs – (Hewlett-Packard, Palo Alto, California, U.S.A.)

Laboratory for Experimental Economics and Political Science – (EEPS) – (CalTech, California, U.S.A.)

Vecon Lab – (University of Virginia, Virginia, U.S.A.)

MIT Center for Collective Intelligence – (CCI) – (Cambridge, Massachusetts, U.S.A.)

Yahoo! Research Labs – (Yahoo!, Pasadena, California, U.S.A.)

Laboratory for Economics Management and Auctions – (LEMA) – (Penn State University, Pennsylvania, U.S.A.)

MicroSoft Research – (MicroSoft, Redmont, Washington, U.S.A.)

Google‘s Economics Group – (Google, Mountain View, California, U.S.A.)

Center for Prediction Markets – (National Chengchi University, Taiwan)

Knowledge Lab – (Witten/Herdecke U., Cologne, Germany, E.U.)

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Contact me to submit other entries.

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Inkling – URL: Inkling Markets – (Chicago, Illinois, U.S.A.)

• Adam Siegel — Post Archives at Midas Oracle
• Nathan Kontny

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NewsFutures – (Maryland, U.S.A. & Paris, France, E.U.)

• Emile Servan-Schreiber — Post Archives at Midas Oracle
• Maurice Balick

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Xpree – (U.S.A.)

• Mat Fogarty — Post Archives at Midas Oracle

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HP Services – HP Labs – (U.S.A.)

• Predicting the future –with games — Introductory article
• Information Dynamics Lab — Internal prediction markets
• BRAIN – (Behaviorallly Robust Aggregation of Information in Networks) — Scoring Rules (i.e., non-trading technique)
• Bernardo A. Huberman – Bernardo Huberman – Senior Fellow & Director
• Kay-Yut Chen -
• Google Search for “prediction markets”

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Hollywood Stock Exchange (HSX) & HSX Research – (L.A., California, U.S.A.)

• Prediction market consultancy firm
• Movie business

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Chris Hibbert – (California, U.S.A.)

• Chris Hibbert (Software architect / Zocalo project manager) — Post Archives at Midas Oracle
• Chris Hibbert’s personal website — Chris Hibbert’s personal blog —
• Chris Hibbert’s CommerceNet profile — (His stint there ended in mid-2006.)

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Robin Hanson – (George Mason U., Virginia, U.S.A.)

• Robin Hanson — Post Archives at Midas Oracle
• Robin Hanson does prediction market consulting work, and have no exclusive arrangements.
• “I’m more interested in helping groups that want to add lots of value to big decisions, versus groups that just want to dabble in a new fad.”

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Justin Wolfers – (U. of Pennsylvania’s Wharton business school, Pennsylvania, U.S.A.)

• Justin Wolfers — Post Archives at Midas Oracle
• Justin Wolfers takes on prediction market consulting work.
• The prediction market industry is “a case where the interaction between firm practice and academic research are reasonably close.”

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Koleman Strumpf – (U. of Kansas, Kansas, U.S.A.)

• Koleman Strumpf — Post Archives at Midas Oracle
• Koleman Strumpf can be approached to consult on prediction market projects.
• “Prediction markets help harness the knowledge of diverse groups. They have great potential as a tool for industry.”

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Michael Giberson – (Virginia, U.S.A.)

• Michael Giberson (energy economist, who is also an expert in prediction markets) — Post archives at Midas Oracle
• Knowledge Problem – Blog on economics, energy policy, more.

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Robert Hahn – (American Enterprise Institute, Washington, D.C., U.S.A.)

• Robert Hahn — Post Archives at Midas Oracle
• Robert Hahn does consulting focused on improving decision making in the private and public sector. “This work builds on our evolving understanding of prediction markets and other economic tools.”

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IntelliMarket Systems – (L.A., California, U.S.A.)

• Charles R. Plott – Charles Plott – (CalTech Inst., California, U.S.A.)

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Mercury Research and Consulting – (United Kingdom, E.U.)

• Jed Christiansen — Post Archives at Midas Oracle

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Ask Markets – (Greece, E.U.)

• George Tziralis — Post Archives at Midas Oracle

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Gexid – Global Exchange for Information Derivatives – (Germany, E.U.)

• Bernd Ankenbrand — Post Archives at Midas Oracle

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Nosco – (Danemark, E.U.)

• Jesper Krogstrup — Post Archives at Midas Oracle
• Oliver Bernhard Pedersen

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Qmarkets – (Israel)

• Noam Danon — Post Archives at Midas Oracle

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ProKons – (Germany)

• Peter Gollowitsch

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Hive Insight – (Raleigh-Durham, North Carolina, U.S.A. & London, U.K., E.U.)

• Robert Wilburn (ex-NewsFutures)

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Foresight Markets – (??)

• BPH Technologies

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NimaniX – (Israel)

• Elad Amir (CEO), Littal Shemer Haim (VP Business development), David Shahar (VP R&D)

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PrediCom – (London, United Kingdom, E.U.)

• Mikael Edholm

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[...] Since the election season began, investors on Intrade have risked $4.6 million in trades on Sen. Clinton and $3.4 million on Sen. Obama. [...] Robin Hanson, an economics professor at Virginia’s George Mason University, says the predictions markets work much as other markets do, accumulating the best information of a self-selected group of people who are willing to bet money they are right. That differs from opinion polls, he adds, where people have no stake in the outcome and no incentive to get it right. “Markets give incentives to think carefully.” [...]

Funny enough, the title of the piece contains the phrase “prediction traders“. I like that.

[Robin Hanson]

[InTrade]

It’s too bad Europe, Japan, and Canada caved. Here’s hoping little Antigua stays plucky.

A few observations:

First, and most obviously, the U.S. government is so hellbent on policing the online habits of its citizens, it’s willing to pay what will likely be tens of billions of dollars of money in trade reparations—taken from same said U.S. citizens in tax receipts—to maintain its dumb ban on consensual online wagering.

Second, the U.S. could have resolved all of this and preserved its precious gambling prohibition by simply making the prohibition uniform. But that wouldn’t do. Just as important as the ban on Internet gambling itself were the carve-outs for politically-protected special interest groups. Think state lotteries, or the horse racing industry, which has over the years given generously to the campaigns of people like Kentucky Sen. Mitch McConnell and Virginia Rep. Bob Goodlatte, who decry the immorality of online poker while also supporting carveouts for the ponies. So the tens of billions the U.S. government is paying to settle the trade dispute is not only to preserve the gambling ban, it’s to preserve the congressionally-granted monopoly on online wagering for interests with more political clout than poker players.

Finally, U.S. Trade Office flack Gretchen Hamel apparently told Reuters she “isn’t going to get into” the terms of the settlement. Pardon? Is the settlement not being paid with public funds? Aren’t the people who negotiated the settlement employees of the U.S. government? On what grounds does the U.S. Trade Office feel it’s entitled to withhold this information?

Previously: The European Commission dealt a blow to European online gaming companies Monday when it accepted a U.S. offer of openings in other sectors as compensation for closing the U.S. gambling market to foreign firms.

Cabinet Exit Dates

• Chancellor
• Foreign Secretary
• Home Secretary

Cabinet Specials

• Next Chancellor
• Next Foreign Secretary
• Next Home Secretary
• Next Prime Minister

Leader Exit Dates

• David Cameron
• Gordon Brown

Next General Election

• Election Date
• Most Seats
• Overall Majority
• Party Leaders

Next Lib Dem Leader

The prediction exchanges (betting exchanges) that organize the most socially valuable prediction markets are InTrade and PopSci PPX, I would say.

It would be interesting to investigate who edited the Wikipedia pages on prediction markets and betting exchanges. (At the time of writing, Wiki Scanner was out of service.)

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UPDATE: BetFair, TradeSports-InTrade and the Hollywood Stock Exchange do control what you read on Wikipedia.

- BetFair has been editing the Wikipedia page on “betting exchanges” 6 times.

- TradeSports-InTrade has been editing the Wikipedia page on “prediction markets” 33 times.

- Cantor (the owner of the HSX): 134 times.

- Google (of Bo Cowgill) and Yahoo! (of David Pennock and Daniel Reeves): hundreds of times.

- University of Iowa (the owner of the Iowa Electronic Markets), George Mason University (the working place of Robin Hanson): thousands of time.

- MicroSoft (of Henry Berg): DOZENS OF THOUSANDS OF TIMES.

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Lance Fortnow (University of Chicago) wrote:

So how did those predictions go? In short you can say the markets predicted every individual race correctly but got the senate wrong, but let us look a little more carefully.

At about 9 AM CST on the morning of election day I made a snap shot of the map for a Discovery Channel Website article.

Every state colored blue was won by a democrat and every state colored red went to a republican. But also note the 69% given to GOP (Republican) Senate control although this election will give control to the democrats. No outcome would have made all the states and senate control agree with the 9 AM map.

Were the markets inconsistent? No, because the markets predict not absolutely but probabilistically. For example, the markets gave a probability of winning 60% for each of Virginia and Missouri and the democrats needed both to take the senate. If these races were independent events, the probability that the democrats take both is 36% or a 64% chance of GOP senate control assuming no other surprises.

Of course the races were not independent events and there are other states involved making it more difficult to compare the probabilities of the individual races with that of senate control.

So how did the markets do as predictors? Quite well as the outcome seems quite reasonable given the markets. Other outcomes would have also been reasonable such as the Democrats losing Virginia and the senate remaining in republican hands, a possibility that came very close to happening.