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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Is Yvette Cooper surging?

The bookmakers and Westminster are in a flurry. Is Yvette Cooper going to win after all? I'm not convinced. 

Is Yvette Cooper surging? The bookmakers have cut her odds, making her the second favourite after Jeremy Corbyn, and Westminster – and Labour more generally – is abuzz with chatter that it will be her, not Corbyn, who becomes leader on September 12. Are they right? A couple of thoughts:

I wouldn’t trust the bookmakers’ odds as far as I could throw them

When Jeremy Corbyn first entered the race his odds were at 100 to 1. When he secured the endorsement of Unite, Britain’s trade union, his odds were tied with Liz Kendall, who nobody – not even her closest allies – now believes will win the Labour leadership. When I first tipped the Islington North MP for the top job, his odds were still at 3 to 1.

Remember bookmakers aren’t trying to predict the future, they’re trying to turn a profit. (As are experienced betters – when Cooper’s odds were long, it was good sense to chuck some money on there, just to secure a win-win scenario. I wouldn’t be surprised if Burnham’s odds improve a bit as some people hedge for a surprise win for the shadow health secretary, too.)

I still don’t think that there is a plausible path to victory for Yvette Cooper

There is a lively debate playing out – much of it in on The Staggers – about which one of Cooper or Burnham is best-placed to stop Corbyn. Team Cooper say that their data shows that their candidate is the one to stop Corbyn. Team Burnham, unsurprisingly, say the reverse. But Team Kendall, the mayoral campaigns, and the Corbyn team also believe that it is Burnham, not Cooper, who can stop Corbyn.

They think that the shadow health secretary is a “bad bank”: full of second preferences for Corbyn. One senior Blairite, who loathes Burnham with a passion, told me that “only Andy can stop Corbyn, it’s as simple as that”.

I haven’t seen a complete breakdown of every CLP nomination – but I have seen around 40, and they support that argument. Luke Akehurst, a cheerleader for Cooper, published figures that support the “bad bank” theory as well.   Both YouGov polls show a larger pool of Corbyn second preferences among Burnham’s votes than Cooper’s.

But it doesn’t matter, because Andy Burnham can’t make the final round anyway

The “bad bank” row, while souring relations between Burnhamettes and Cooperinos even further, is interesting but academic.  Either Jeremy Corbyn will win outright or he will face Cooper in the final round. If Liz Kendall is eliminated, her second preferences will go to Cooper by an overwhelming margin.

Yes, large numbers of Kendall-supporting MPs are throwing their weight behind Burnham. But Kendall’s supporters are overwhelmingly giving their second preferences to Cooper regardless. My estimate, from both looking at CLP nominations and speaking to party members, is that around 80 to 90 per cent of Kendall’s second preferences will go to Cooper. Burnham’s gaffes – his “when it’s time” remark about Labour having a woman leader, that he appears to have a clapometer instead of a moral compass – have discredited him in him the eyes of many. While Burnham has shrunk, Cooper has grown. And for others, who can’t distinguish between Burnham and Cooper, they’d prefer to have “a crap woman rather than another crap man” in the words of one.

This holds even for Kendall backers who believe that Burnham is a bad bank. A repeated refrain from her supporters is that they simply couldn’t bring themselves to give Burnham their 2nd preference over Cooper. One senior insider, who has been telling his friends that they have to opt for Burnham over Cooper, told me that “faced with my own paper, I can’t vote for that man”.

Interventions from past leaders fall on deaf ears

A lot has happened to change the Labour party in recent years, but one often neglected aspect is this: the Labour right has lost two elections on the bounce. Yes, Ed Miliband may have rejected most of New Labour’s legacy and approach, but he was still a protégé of Gordon Brown and included figures like Rachel Reeves, Ed Balls and Jim Murphy in his shadow cabinet.  Yvette Cooper and Andy Burnham were senior figures during both defeats. And the same MPs who are now warning that Corbyn will doom the Labour Party to defeat were, just months ago, saying that Miliband was destined for Downing Street and only five years ago were saying that Gordon Brown was going to stay there.

Labour members don’t trust the press

A sizeable number of Labour party activists believe that the media is against them and will always have it in for them. They are not listening to articles about Jeremy Corbyn’s past associations or reading analyses of why Labour lost. Those big, gamechanging moments in the last month? Didn’t change anything.

100,000 people didn’t join the Labour party on deadline day to vote against Jeremy Corbyn

On the last day of registration, so many people tried to register to vote in the Labour leadership election that they broke the website. They weren’t doing so on the off-chance that the day after, Yvette Cooper would deliver the speech of her life. Yes, some of those sign-ups were duplicates, and 3,000 of them have been “purged”.  That still leaves an overwhelmingly large number of sign-ups who are going to go for Corbyn.

It doesn’t look as if anyone is turning off Corbyn

Yes, Sky News’ self-selecting poll is not representative of anything other than enthusiasm. But, equally, if Yvette Cooper is really going to beat Jeremy Corbyn, surely, surely, she wouldn’t be in third place behind Liz Kendall according to Sky’s post-debate poll. Surely she wouldn’t have been the winner according to just 6.1 per cent of viewers against Corbyn’s 80.7 per cent. 

Stephen Bush is editor of the Staggers, the New Statesman’s political blog.