
Review of Fortune’s Formula by William Poundstone: The stranger-than-fiction tale of how to invest
What is a better investment objective? Grow as wealthy as possible as quickly as possible, or Maximize expected wealth for a given time period and level of risk The question is at the heart of a fight between computer scientists and economists chronicled beautifully in the book Fortune’s Formula by Pulitzer Prize nominee William Poundstone. [...]
What is (and what good is) a combinatorial prediction market?
What exactly is a combinatorial prediction market? 2010 Update: Several of us at Yahoo! Labs, along with academic researchers, have theorized and written about combinatorial prediction markets for several years, as you’ll see below. But now we’ve gone beyond talking about them and actually built one. So the best way to answer the question is [...]
The right way to implement a multi-outcome prediction market: Linear programming
There are many examples of multi-outcome prediction markets, for example election markets with more than two candidates, or sports championship markets with dozens of teams. What is the best way to implement a multi-outcome prediction market? The simplest way is to effectively ignore the fact that there are multiple outcomes, breaking up the market into [...]
The wisdom of the ProbabilitySports crowd
One of the purest and most fascinating examples of the “wisdom of crowds” in action comes courtesy of a unique online contest called ProbabilitySports run by mathematician Brian Galebach. In the contest, each participant states how likely she thinks it is that a team will win a particular sporting event. For example, one contestant may [...]
Evaluating probabilistic predictions
A number of naysayers [Daily Kos, The Register, The Big Picture, Reason] are discrediting prediction markets, latching onto the fact that markets like TradeSports and NewsFutures failed to call this year’s Democratic takeover of the US Senate. Their critiques reflect a clear misunderstanding of the nature of probabilistic predictions, as many others [Emile, Lance] have [...]
Implementing Hanson's Market Maker
Robin Hanson invented a wonderful market maker well suited for use in prediction market applications with a long name: the logarithmic market scoring rule market maker, which I’ll abbreviate as LMSR. (In fact, Hanson invented an entire class of market scoring rule market makers, but the logarithmic variant seems the most useful.) Hanson’s two papers [...]
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Predicting media success
Often, predicting success is being a success. Witness Sequoia Capital or Warren Buffet.
In the media industry (e.g., books, celebs, movies, music, tv, web), predicting success largely boils down to predicting popularity.
Predicting popularity would be wonderfully easy, if it weren’t for one inconvenient truth: people herd. If only people were as fiercely independent as they sometimes claim to be — if everyone decided what they liked independently, without regard to what others said — then polling would be the only technology we would need. A small audience poll would foreshadow popularity with high accuracy.
Alas, such is not the case. No one consumes media in a vacuum. People are persuaded by influencers and influenced by persuaders. People respond in whole or in part to the counsel of critics, peers, viruses, and (yes) advertisers. So, what becomes popular is not simply a matter of what is good. What becomes popular depends on a complex dynamic process of spreading influence that’s hard to track and even harder to predict.
Columbia sociologist (and I’m happy to note future Yahoo) Duncan Watts and his colleagues conducted an artful study — described eloquently in the NY Times — asking just how much of media success reflects the true quality of the product, and how much is due to the quirks of social influence. In a series of carefully controlled experiments, the authors tease apart two distinct factors in a song’s ultimate success: (1) the inherent quality of the song, or the degree people like the song if presented it in isolation, and (2) dumb luck, or the extent the song happens by chance to get some of the best early buzz, snowballing it to the top of the charts in a self-fulfilling prophesy. Lo and behold, they found that, while inherent quality does matter, the luck of the draw plays at least as big a role in determining a song’s ultimate success.
If so, Big Media might be forgiven for their notoriously poor record of picking winners. Over and over, BM hoists on us stinkers like Gigli and stale knockoffs like Treasure Hunters. (In prediction lingo, these are false positives.) At the same time, BM snubbed (at least initially) some cultural institutions like Star Wars and Seinfeld. (False negatives.)
So, are media executives making the best of a bad situation, eking out as much signal as possible from an inherently noisy process? Or might some other institution yield forecasts with fewer false-atives?
I think you know where this is going. Prediction markets for media!
Media Predict is exactly that: a new prediction market aimed at forecasting media success. I’d like to congratulate founder Brent Stinski on a spectacular launch done right. Media Predict sprinted out of the gates with a deal with Simon & Schuster’s Touchstone Books and a companion piece in the NY Times, spawning coverage in The Economist and NPR. (Also congrats to Inkling Markets, the “powered by” provider.) More importantly, the website is clean, clear, complete (enough), and ready for launch.
I first met Brent Stinski in 2006 at Collabria’s NYC Prediction Markets Summit and his concept impressed me. Among the flury of recent play money PM startups, Media Predict’s business plan seems one of the most credible. The site taps simultaneously into the wisdom of crowds ethos, the user-generated content explosion, artists’ anti-establishment streak, and the public’s ambivalence toward Big Media. (The latter two factors are epitomized no more vehemently and eloquently than in an essay by Courtney Love, and stoke the fires of sites like Garage Band, Magnatune, Creative Commons, Lulu, Kinooga, and even MySpace, not to mention mashup fever, open source, anti-DRM-ism, etc.)
The New York publishing world is ridiculing Simon & Schuster for ceding its editorial power to the crowd. (In fact, S&S reserves the right to choose any book or none at all.)
Time will tell whether prediction markets can be better than (or at least more cost effective than) traditional media executives. One thing is for certain: one way or another, the power structure in the publishing world is changing rapidly and dramatically (no one sees and explains this better than Tim O’Reilly). My bet is that many artists and consumers will emerge feeling better than ever.