Sellers on Amazon use automatic tools which pushed a book on flies up to $23,698,655.93

Robo-pricing gone wrong

Barney Jopson for the Financial Times:

Amazon sellers – using third-party software – can set rules to ensure their prices are always, for example, $1 lower than their rivals’. More complex algorithms can analyse data to set prices most likely to secure a prominent position on the site.

Last year, out-of-control algorithms inflated the price of The Making of a Fly, a genetics book, to more than $23m, according to Michael Eisen, a biologist who blogged about it.

Eisen's blog is a great case study. My favourite excerpt:

The behavior of [one of the sellers,] profnath is easy to deconstruct. They presumably have a new copy of the book, and want to make sure theirs is the lowest priced – but only by a tiny bit ($9.98 compared to $10.00). Why though would  [the second seller] bordeebook want to make sure theirs is always more expensive? Since the prices of all the sellers are posted, this would seem to guarantee they would get no sales. But maybe this isn’t right – they have a huge volume of positive feedback – far more than most others. And some buyers might choose to pay a few extra dollars for the level of confidence in the transaction this might impart. Nonetheless this seems like a fairly risky thing to rely on – most people probably don’t behave that way – and meanwhile you’ve got a book sitting on the shelf collecting dust. Unless, of course, you don’t actually have the book….

My preferred explanation for bordeebook’s pricing is that they do not actually possess the book. Rather, they noticed that someone else listed a copy for sale, and so they put it up as well – relying on their better feedback record to attract buyers. But, of course, if someone actually orders the book, they have to get it – so they have to set their price significantly higher – say 1.27059 times higher – than the price they’d have to pay to get the book elsewhere.

Of course, realistically this sort of thing isn't the natural result of computers entering the fray; if the two booksellers had used the tool at all well, they would presumeably have entered some sort of upper bound, where an actual human person would be notified.

Really, this is just another example of how the internet makes economics textbooks come to life. This is exactly the sort of situation which sounds like it might happen in theory, but never could in practice, and then, all of a sudden, it does. Amazon has already been known to practice dynamic pricing, charging customers the most it thinks they will pay. What next?

A really expensive book? Or a really well-designed fly?

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Commons Confidential: What happened at Tom Watson's birthday party?

Finances, fair and foul – and why Keir Starmer is doing the time warp.

Keir Starmer’s comrades mutter that a London seat is an albatross around the neck of the ambitious shadow Brexit secretary. He has a decent political CV: he was named after Labour’s first MP, Keir Hardie; he has a working-class background; he was the legal champion of the McLibel Two; he had a stint as director of public prosecutions. The knighthood is trickier, which is presumably why he rarely uses the title.

The consensus is that Labour will seek a leader from the north or the Midlands when Islington’s Jeremy Corbyn jumps or is pushed under a bus. Starmer, a highly rated frontbencher, is phlegmatic as he navigates the treacherous Brexit waters. “I keep hoping we wake up and it’s January 2016,” he told a Westminster gathering, “and we can have another run. Don’t we all?” Perhaps not everybody. Labour Remoaners grumble that Corbyn and particularly John McDonnell sound increasingly Brexitastic.

To Tom Watson’s 50th birthday bash at the Rivoli Ballroom in south London, an intact 1950s barrel-vaulted hall generous with the velvet. Ed Balls choreographed the “Gangnam Style” moves, and the Brockley venue hadn’t welcomed so many politicos since Tony Blair’s final Clause IV rally 22 years ago. Corbyn was uninvited, as the boogying deputy leader put the “party” back into the Labour Party. The thirsty guests slurped the free bar, repaying Watson for 30 years of failing to buy a drink.

One of Westminster’s dining rooms was booked for a “Decent Chaps Lunch” by Labour’s Warley warrior, John Spellar. In another room, the Tory peer David Willetts hosted a Christmas reception on behalf of the National Centre for Universities and Business. In mid-January. That’s either very tardy or very, very early.

The Labour Party’s general secretary, Iain McNicol, is a financial maestro, having cleared the £25m debt that the party inherited from the Blair-Brown era. Now I hear that he has squirrelled away a £6m war chest as insurance against Theresa May gambling on an early election. Wisely, the party isn’t relying on Momentum’s fractious footsloggers.

The word in Strangers’ Bar is that the Welsh MP Stephen Kinnock held his own £200-a-head fundraiser in London. Either the financial future of the Aberavon Labour Party is assured, or he fancies a tilt at the top job.

Dry January helped me recall a Labour frontbencher explaining why he never goes into the Commons chamber after a skinful: “I was sitting alongside a colleague clearly refreshed by a liquid lunch. He intervened and made a perfectly sensible point without slurring. Unfortunately, he stood up 20 minutes later and repeated the same point, word for word.”

Kevin Maguire is the associate editor (politics) of the Daily Mirror

Kevin Maguire is Associate Editor (Politics) on the Daily Mirror and author of our Commons Confidential column on the high politics and low life in Westminster. An award-winning journalist, he is in frequent demand on television and radio and co-authored a book on great parliamentary scandals. He was formerly Chief Reporter on the Guardian and Labour Correspondent on the Daily Telegraph.

This article first appeared in the 19 January 2016 issue of the New Statesman, The Trump era