Could prediction markets help our society to become more truthful?

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[…] [About the Iraq war] – “There is no question that America is living a nightmare with no end in sight,” retired Lt. Gen. Ricardo Sanchez told a convention of military journalists on Friday. […]

But why didn&#8217-t he come forward before, then?

[…] Asked why he did not speak out about his concerns, Sanchez said general officers take an oath to carry out the orders of the president while in uniform. “The last thing that America wants, the last thing that you want, is for currently serving general officers to stand up against our political leadership,” he said. However, general officers do have the option of stepping down if they disagree with the country&#8217-s leaders. Sanchez said he felt he could not resign and go public with his reservations while he was in Iraq, because he feared that move could further jeopardize troops serving there. “I think once you are retired, you have a responsibility to the nation, to your oath, to the country, to state your opinion,” he said.

Associated Press:

Retired Lt. Gen. Ricardo Sanchez

We can&#8217-t rely on retirees to tell us the truth. We need an anonymous information aggregation mechanism that gives an incentive to people who come forward with advanced information: the prediction markets.

UsableMarkets Reports from the NYC Prediction Market Conference (Yes, a little, er, a lot, late)

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I recently published some thoughts resulting from the NYC Prediction Market Conference.

There were three items:

1. Contract Content which discusses &#8220-whether having related content and links appear alongside a contract make any difference as to how well informed the traders are when trading that contract … and therefore, does it have any impact on the price of that contract?&#8221-

2. Losing the Market in Prediction Markets talks about the recognition that the desire for simpler trading interfaces in the prediction market community is finally leading to real results, as an abundance of sites, if not every PM site, looks to make predicting easier to do, and understand.

3. Shapers and Voters reflects on a slide about trader distribution in Jed Christiansen&#8217-s presentation.

I hope you enjoy.
~alex

What in the hells global warming have to do with world peace?

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Asks Rush Limbaugh. Maybe our good friend Caveat Bettor could answer this question. Rush Limbaugh thinks they should give the Nobel Peace price&#8230- to him (no kidding):

I don&#8217-t even know why Gore&#8217-s qualified for this. &#8230- I have done more for world peace to promote liberty and freedom than Al Gore has.

My lawyers at the Landmark Legal Foundation are looking into the possibility of filing an objection with the Nobel committee over the unethical tampering for this award that Al Gore is engaging in.

What in the hell&#8217-s global warming have to do with world peace?

I file this blog post in the &#8220-humor&#8221- category, of course. :-D Not sure whether Rush Limbaugh&#8217-s humor is intentional, though.

Previous: Will Al Gore win the 2007 Nobel Peace Prize?

The InTrade-TradeSports explainer

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InTrade-TradeSports:

I just want to make a bet – what do I do?
– In this case you may want to go to our Betting Screen. This displays the bets in a format familiar to Sports Book users. On the Betting Screen you can view moneyline or digital odds and choose the amount of money you want to bet. The Betting Screen has a seperate Help section to get you started.

I think an outcome isn&#8217-t going to happen, but you don&#8217-t have the opposite result, what do I do?
– That&#8217-s the beauty of InTrade, to bet against an outcome you simply sell the contract.

But I don&#8217-t own any contracts, how can I sell something I don&#8217-t own?
InTrade is modeled on a futures exchange. On InTrade when you sell a contract you&#8217-re actually entering into an agreement to sell the contract when it expires. So if you sell at 35 and the contract expires at zero you make 35 points because the contract is worth nothing. However if the contract was worth 100 then you have to pay the difference, in this case 65 points. The value of a point can vary depending on the contract, but for most contracts on InTrade one point is worth $0.10.

Justin Wolfers guest-blogging week at Marginal Revolution is over.

No GravatarJusitn Wolfers:

I&#8217-ve been amazed by how much work blogging can be. More than anything else, this past week has simply increased my admiration for the work that Alex [Tabarrok] and Tyler [Cowen] put into this site and our community.

Yes, blogging is hard and difficult. But Justin Wolfers has experienced only one third of the whole experience &#8212-writing. The two other parts are: finessing the parameters of your blogging software, and marketing your blog, posts and pages. In my experience, the last thing is the most difficult &#8212-you have to get inbound links from big bloggers, otherwise nobody reads you and the search engines don&#8217-t compute you. Your blog will only matter in your industry if you excel at each of these three tasks. (And if what you run is a group blog, then there is a fourth task, which is inciting other people to write for your group blog for free. :-D )

So, how did you like Justin Wolfers&#8217- guest-blogging week at Marginal Revolution?

Great. Smart guy. Very open to others. Very willing to let the readers discover plenty of external resources (including, two times, a weird stuff called Midas Oracle :-D ). His blogging style resembles much David Pennock&#8217-s one. That is, a smooth mix of home-made essays and news aggregation items. Very different than Robin Hanson&#8217-s blogging. (Robin Hanson is on a quest to show off that he is the world&#8217-s most intelligent human being, which is boring most of the times, but can output highly valuable fruits, occasionally.)

Read the previous blog posts by Chris F. Masse:

  • Bzzzzzzzzz…
  • Bzzzzzzzzz…
  • “No offense, but I think Radley Balko is the most valuable blogger in America right now.”
  • Are you a better predictor than John McCain?
  • What does climate scientist James Annan think of InTrade’s global warming prediction markets?
  • Inkling Markets, one year later
  • One trader’s view on BetFair’s new bet-matching logic

Prediction market infiltrations in the media – US vs. UK

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Folks, I want to tackle this important issue in this blog post. But first, I will excerpt two news articles from The Economist. The first one was written by their American correspondence, and the second one was written by their UK-based journalists. [Technical Note: Since each of the stories from The Economist is written collectively by a bunch of journalists (whose names are not disclosed, by the way), this is the reason I use the plural for the word “journalists”.]

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The Economist #1:

Hillary Clinton
Ready to run the movie again?

Oct 4th 2007 | WASHINGTON, DC
From The Economist print edition
The betting is that the Clintons will follow the Bushes back into the White House

[SECOND PARAGRAPH] […] Mrs Clinton is way out in front of the Democratic field. The latest Washington Post/ABC News poll puts her 33 points ahead of Barack Obama and 40 points ahead of John Edwards. She raised $22m in the last quarter—more than Mr Obama at $19m and much more than Mr Edwards at $7m. The once-mighty Republican Party is a shadow of its former self, divided not only about who should lead it but also about where it should go. Intrade, a pay-to-play prediction market, shows a 36% chance of the Republicans holding the White House alongside a 12% chance of them taking the House and a 7% chance they might take the Senate. […]

The Economist #2:

Polls and elections
One man, one decision

Oct 4th 2007 – [BY A UK-BASED TEAM OF JOURNALISTS, I SUPPOSE]
From The Economist print edition
Public-opinion surveys cannot tell the prime minister when to go to the country

[LAST PARAGRAPH] In 2005 the most accurate predictions came not from the opinion polls but from online betting markets. This time, says Leighton Vaughan Williams of Nottingham Trent University&#8217-s Betting Research Unit, an election before Christmas is odds on and Labour is hot favourite to win the most seats. But the odds that Labour will get an overall majority are just slightly better than even. “So,” asks Mr Vaughan Williams, “is the prime minister willing to risk his majority on the toss of a coin?”

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– INTERESTING OBSERVATION: Right away, in the first paragraph, the US-based journalists inform their audience with a combo of polls and probabilistic probabilities from the most liquid betting exchange in America (InTrade). Whereas the UK-based journalists will give, in the last paragraph, a bit like an anecdote you tell to your friends at the end of a good lunch, some vague indications given by the &#8220-betting markets&#8221- (not well defined). [*]

– ANALYSIS &amp- REMEDY: My hunch is that the UK-based journalists have not been spinned well enough by the prediction market economists. The remedy is that the British journalists (news writers, reporters, columnists, bloggers, etc.) should be exposed to the wisdom-of-crowds science in events or press conferences.

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[*] ADDENDUM: Professor Leighton Vaughan-Williams&#8216- e-mail to me&#8230-

In the &#8216-Economica&#8217- article reference is made to the 2005 British election. For that election I used exchanges (notably, but not exclusively, Betfair and Intrade), the Cantor Spreadfair &#8217-spread betting&#8217- exchange, spread bookmakers, notably IG Index and Sporting Index, and to a lesser extent fixed-odds bookmakers like Ladbrokes and William Hill.

In reference to the next election, the odds quoted were those quoted on Betfair at 9.30 am (UK time) yesterday.

Betfair must display its revolutionary credentials.

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When publishing its results for the year ended 30 April 2007, Betfair said that it was in a &#8220-Very strong cash position with 180m stg of corporate funds at the year end in addition to 174m of client funds held on trust in seperate ring fenced accounts.&#8221- 174m sitting in a bank for a year, would, with an interest rate of 5.5% yield 9.6m. A radical thought, I know, but isn&#8217-t it time that the company began to pay interest to those that have money on deposit with it?

A second interesting aspect of Betfair&#8217-s recent results, concerned its disclosure that Timeform, which it acquired at the end of November 2006, for around ?15m, had &#8220-made a small loss in its first five months of trading after acquisition.&#8221- There are grounds for questioning the strategic viability of this acquisition, but perhaps what is most interesting, is the fact that Betfair is not exploiting a rich vein of content that is parked on its own servers.

Betfair is sitting on the most comprehensive database of information pertaining to the workings of the horse racing and sports betting markets ever compiled. Rather than give snippets of this information to some fat cat academic, who will then publish it in a weighty tome, priced well beyond the reach of the average punter, Betfair should release as much of it as is feasibly possible to the betting public.

Such an act would serve to give credence to the company&#8217-s claim that is has revolutionised the betting industry. Failure to do so, may leave it open to the charge that such information is being exploited by its employees, at the expense of the average punter in the street.

As a company that has consistently positioned itself as a radical alternative to traditional bookmakers, Betfair seems somewhat shy when it comes to disclosing which of said bookmakers, use it&#8217-s exchange as a hedging mechanism. It was recently alleged, for example, that Interactive Gaming Holdings, the owner of PremierBet and Heathorns, went to the wall owing Betfair the sum of 250K. And IG Index recently said that its sport business achieved revenue growth of 37%, to ?6m, with a component of this growth being their new business of market making into the betting exchanges- with revenue for the six months to 30 November 2006 coming in at ?650,000. Those that trade on Betfair are entitled to know who it is they are competing with – Time for full disclosure.

A final point concerns situations where betting markets are suspended due to fradulent activity. Is it right that Betfair should benefit from such markets, through the holding on to commission that it has earned on the market?

Four simple points- interest payments on all deposits- the opening up of its databases- the disclosure of all betting and spread betting companies that use its exchange- the return of commission that has been earned on fradulent markets. If Betfair does not implement them, then its competitors should.

[Cross-posted from Betting Market]

Predictor Accuracy: the Hedgehog vs. the Fox

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Ellen Goodman:

[…] The closed-minded hedgehogs are those who know &#8221-one big thing&#8221- and relate everything to that single, central vision. The open-minded foxes &#8221-know many little things&#8221- and accept ambiguity and contradictions. […] It&#8217-s no surprise that foxes are better at forecasting than hedgehogs. […] How then do we cultivate good judgment? Most Americans are probably hybrid creatures. In a fox-like moment, Tetlock advises that we listen to our own ambivalence as &#8221-we struggle to strike the right balance between preserving our existing worldview and rethinking core assumptions.&#8221- […]

Hal Finney:

[…] One of the psychological measures or metrics which Tetlock found was well correlated with expert accuracy goes back to a distinction introduced by Isaiah Berlin in his book, The Hedgehog and the Fox. I haven&#8217-t read that book, but based on Tetlock&#8217-s presentation, Berlin distinguished between two cognitive styles to which he gave these colorful names. The hedgehog is said to know one thing and know it well. He sees events and trends in terms of his big idea, and aggressively extends it into new realms. Hedgehogs tend to be confident in the applicability of their fundamental concepts and impatient with those who &#8220-do not get it&#8221-. Foxes in contrast know many small things which they bring to bear in their analyses in a dynamical and flexible way. They tend to be uncertain and flexible, &#8220-on the other hand&#8221- types who are skeptical about their own predictive ability and in fact about the whole enterprise of making predictions in such an intractable realm. […]

Daniel Drezner:

A hedgehog is a person who sees international affairs to be ultimately determined by a single bottom-line force: balance-of-power considerations, or the clash of civilizations, or globalization and the spread of free markets. A hedgehog is the kind of person who holds a great-man theory of history, according to which the Cold War does not end if there is no Ronald Reagan. Or he or she might adhere to the “actor-dispensability thesis,” according to which Soviet Communism was doomed no matter what. Whatever it is, the big idea, and that idea alone, dictates the probable outcome of events. For the hedgehog, therefore, predictions that fail are only “off on timing,” or are “almost right,” derailed by an unforeseeable accident. There are always little swerves in the short run, but the long run irons them out.

Foxes, on the other hand, don’t see a single determining explanation in history. They tend, Tetlock says, “to see the world as a shifting mixture of self-fulfilling and self-negating prophecies: self-fulfilling ones in which success breeds success, and failure, failure but only up to a point, and then self-negating prophecies kick in as people recognize that things have gone too far.”

I wanted to go back to this 2005 book from Philip Tetlock (Expert Political Judgment: How Good Is It? How Can We Know?) because I have been thinking of the big issue of last Tuesday (Should a betting exchange be a content provider, too?). My answer is: A betting exchange has no business being a content provider&#8230- except if the betting exchange can and will develop some very special content that the traditional media can’t or won’t provide, and that is of high strategic interest. You&#8217-ll spot that that&#8217-s the kind of twisted answers that the foxes would give. And I am wondering whether one could say that the hedgehog thinking (read it, the bad thinking) is in fact represented in the two other camps:

  1. those who think that the betting exchanges have no business being content providers-
  2. those who think that the betting exchanges should also be content providers.

The answer to this dilemma is, of course, &#8230- and if Mike Linksvayer is reading this blog post, he has already divined where I want to lead my readers with all this &#8230- the answer is, of course, innovation.

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InTrade-TradeSports should have expired the Larry Craig event derivative today, on October 4, 2007, and not on September 5, 2007.

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US Senator Larry Craig - Mugshot

InTrade-TradeSports should have expired the Larry Craig event derivative today, on October 4, 2007, and not on September 5, 2007. That&#8217-s their main error. Last September, they expired this event derivative on the basis on Larry Craig stating his &#8220-intent to resign&#8221- &#8212-which is different than to announce an upcoming or effective resignation. Larry Craig later changed his &#8220-intent&#8221- &#8212-he then intended to stay in the US Senate (providing he would be able to withdraw his guilty plea). Unfortunately, today, a judge ruled against his attempt to dismiss his guilty plea. So, US Senator Larry Craig is announcing today that:

  1. He is not resigning from the US Senate-
  2. He will not seek re-election for his US Senate seat.

The condition #2 is sufficient to expire the December 2007 Larry Craig contract on the &#8220-yes&#8221- side. (&#8221-Yes&#8221-, he is announcing his &#8220-intention not to run in 2008&#8243-.)

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ADDENDUM: The original InTrade contract

Sen. Larry Craig to announce resignation or intention not to run in 2008 on/before 31 Dec 2007 – This event derivative has been expired by InTrade on September 5, 2007.

Larry Craig Resignation - InTrade Dec 2007

The rules (= the event derivative contract statement):

This contract will settle (expire) at 100 ($10.00) if Senator Larry Craig announces his resignation from the Senate or announces he will not run for re-election in 2008 on or before 11:59:59pm ET on the date specified in the contract.

The contract will settle (expire) at 0 ($0.00) if this does not happen on or before 11:59:59pm ET on the date specified in the contract.

A resignation does not have to result in the actual departure by the contract expiry date but rather the announcement of the resignation must be made before the date and time specified in the contract.

Expiry will be based on official, public announcements made by Larry Craig as reported by three independent and reliable media sources.

Due to the nature of this contract please also see Contract Rule 1.7 Unforeseen Circumstances.

The Exchange reserves the right to invoke Contract Rule 1.8 (Time Protection) if deemed appropriate.

Any changes to the result after the contract has expired will not be taken into account – Exchange Rule 1.4

Please contact the exchange by emailing [email protected] if you have any questions regarding this contract before you place a trade.

Important:
Please contact the Exchange if you have any query or uncertainty (including how it may be settled) about this Contract, the Rule above or the Contract Rules before you trade.

Prediction markets and the flow of information inside organizations

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Discussions of internal corporate prediction markets have sometimes pointed out that open, anonymous participation can lead to better information flow within the corporation. See, for example, Jed Christiansen’s write-up of the recent Consensus Point conference, particularly his notes on the presentations of Dave Perry and Fortune Elkins.

A lot of business research has been devoted to the topic of communication within an organization. An article from HBS Working Knowledge tries to sum up the current state of research into roadblocks to communication within an organization.

This propensity to maintain silence, a flaw at once personal and organizational, is &#8220-widespread and problematic&#8221- in both the public and the private sectors, says HBS professor Amy Edmondson, who chairs the Doctoral Programs and teaches in the Technology and Operations Management unit.

&#8220-To cite one example, former HBS doctoral student Jim Detert and I interviewed some 200 people of all ranks and functions in a high-tech multinational. We found to a very significant degree that people did not speak up about things they deemed important. Most of those were not &#8216-bad news&#8217- things- to our surprise we found that people were reluctant to voice what they perceived to be good ideas, unless they were extraordinarily confident they would be well-received. And this in a firm that lives and dies by its ideas.&#8221-

Edmondson says this reluctance to speak up stems variously from fears that superiors will not like the idea or that it may appear to criticize the status quo, which most people find reassuringly familiar or dangerous to challenge. Edmondson sums up the mental calculation this way: &#8220-The potential costs to me for speaking out seem reasonably certain and somewhat immediate- the potential benefit to me for speaking out seems rather uncertain and definitely long-range.&#8221-

The article cites HBS professor Max Bazerman to the effect that “within organizations, candor should be rewarded and incentives designed to encourage [it],” though the article does little to elaborate on the idea.

Instead, the article urges business executives to “develop disagreement” and suggests installing “a team at the top where high contention is demanded and rewarded.” During decision-making processes, according to one professor quoted, executives should ask probing questions and insist that managers “present each situation in objective terms, rather than with a positive spin.” The article sums up with, “What&#8217-s required in an organization is honest, thorough, and ongoing self-criticism, which, after all, is at the heart of continuous improvement.”

Part of the problem with the article is that it is exactly the old-style managerial approach that apparently doesn’t work. For how many decades have business executives been told to encourage honest disagreement, to reward challenges to the status quo? Saying “challenge the status quo” is the status quo. If it worked, then information would already always flow smoothly within corporations.

When the thing that stops an employee from speaking up is a mental decision calculus that compares relatively certain and immediate costs to uncertain future gains, as described by Edmonson, “demanding and rewarding high contention” just seems to raise the stakes. Raising the stakes seems like it would be counter-productive.

Maybe contentious meetings aren’t a good approach for eliciting honest revelations. So if what is said about prediction markets is true – if they can help information be gathered and processed in cases in which traditional ways of gathering and processing information fail – then they can be wonderful things. What was the example that Christiansen cited (from Perry’s presentation), a “forecasting team was trading against their official forecast”? That example shows information flowing more smoothly through prediction markets than through traditional channels.

The article hints at some of the reasons that prediction markets can improve information flow. With private, anonymous trading, the choice to disclose information via the market dramatically revises the mental decision calculus involved. The trader is rewarded if right and penalized if wrong, but in either case the disclosure and net reward is a private matter rather than social event. (At least until you brag about it around the water cooler.)

As the article said, candor should be rewarded and incentives designed to encourage it. Prediction markets provide incentives for candor. Not only that, but over time the traders with useful candor are encouraged by accumulated gains, while blowhards find their accounts diminished.

It is true that prediction market prices present relatively limited signals. Prices may go up or down, but they never say why. But with a signal, at least someone knows to start asking “why” and that is better than not knowing.

[Cross posted at Knowledge Problem.]