If you've got lucky, it's easy to convince people you're a sage

"Expert" predictions only need a few lucky guesses, then everyone believes them.

LSE's Nattavudh Powdthavee and Nanyang University's Yohanes E. Riyanto presented a paper last month titled Why Do People Pay for Useless Advice? (pdf) The authors demonstrate that people are prepared to pay for investment advice which they know cannot possibly be based on any real evidence – provided the advisor has got things right in the past.

Participants in the experiment were told to bet on five consecutive rounds of coin flips (they could pick the stake, provided it was higher than a minimum level and wouldn't make them lose all their money before the last round). Since they were using a fair coin, the chance of heads or tails coming up each time was 50-50, and the chance of someone calling the correct flips in all five rounds is one in thirty two. More importantly, no amount of expertise can help one predict the outcome of a sequence of coin tosses.

So when the participants were offered the chance to buy "predictions", you would expect them to ignore them. And most of them did, at least for round one (although even then, around 15 per cent of them did pay). But after the first round of tosses, everyone got to see their predictions, even those who hadn't paid. And for half the participants, those predictions were correct. Still, it's obviously just chance, right?

Apparently not so obvious. Those who got a correct "prediction" in round one were three times more likely to pay for one in round two than those who'd got an incorrect one. And by the time a subset of the group had got four correct predictions in a row, the possibility that they would buy a prediction for the fifth round had risen from 15 to 40 per cent.

In other words, just a few lucky guesses are all it takes to get people to pay for what the authors call "transparently useless advice". As they conclude:

Our experiment accurately describes how the real "false" experts typically operate in the information market, and the findings of this paper help to highlight how easy it is for an average person to form a belief in an expert when none may actually exist. 

Something worth bearing in mind next time you are looking at horse tips, stock pickers, or hedge funds, maybe.

George Bush tosses a coin. Is he an expert? Photograph: Getty Images

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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Four times Owen Smith has made sexist comments

The Labour MP for Pontypridd and Jeremy Corbyn’s Labour leadership rival has been accused of misogynist remarks. Again.

2016

Wanting to “smash” Theresa May “back on her heels”

During a speech at a campaign event, Owen Smith blithely deployed some aggressive imagery about attacking the new Prime Minister. In doing so, he included the tired sexist trope beloved of the right wing press about Theresa May’s shoes – her “kitten heels” have long been a fascination of certain tabloids:

“I’ll be honest with you, it pained me that we didn’t have the strength and the power and the vitality to smash her back on her heels and argue that these our values, these are our people, this is our language that they are seeking to steal.”

When called out on his comments by Sky’s Sophy Ridge, Smith doubled down:

“They love a bit of rhetoric, don’t they? We need a bit more robust rhetoric in our politics, I’m very much in favour of that. You’ll be getting that from me, and I absolutely stand by those comments. It’s rhetoric, of course. I don’t literally want to smash Theresa May back, just to be clear. I’m not advocating violence in any way, shape or form.”

Your mole dug around to see whether this is a common phrase, but all it could find was “set back on one’s heels”, which simply means to be shocked by something. Nothing to do with “smashing”, and anyway, Smith, or somebody on his team, should be aware that invoking May’s “heels” is lazy sexism at best, and calling on your party to “smash” a woman (particularly when you’ve been in trouble for comments about violence against women before – see below) is more than casual misogyny.

Arguing that misogyny in Labour didn’t exist before Jeremy Corbyn

Smith recently told BBC News that the party’s nastier side only appeared nine months ago:

“I think Jeremy should take a little more responsibility for what’s going on in the Labour party. After all, we didn’t have this sort of abuse and intolerance, misogyny, antisemitism in the Labour party before Jeremy Corbyn became the leader.”

Luckily for Smith, he had never experienced misogyny in his party until the moment it became politically useful to him… Or perhaps, not being the prime target, he simply wasn’t paying enough attention before then?

2015

Telling Leanne Wood she was only invited on TV because of her “gender”

Before a general election TV debate for ITV Wales last year, Smith was caught on camera telling the Plaid Cymru leader that she only appeared on Question Time because she is a woman:

Wood: “Have you ever done Question Time, Owen?”

Smith: “Nope, they keep putting you on instead.”

Wood: “I think with party balance there’d be other people they’d be putting on instead of you, wouldn’t they, rather than me?”

Smith: “I think it helps. I think your gender helps as well.”

Wood: “Yeah.”

2010

Comparing the Lib Dems’ experience of coalition to domestic violence

In a tasteless analogy, Smith wrote this for WalesHome in the first year of the Tory/Lib Dem coalition:

“The Lib Dem dowry of a maybe-referendum on AV [the alternative vote system] will seem neither adequate reward nor sufficient defence when the Tories confess their taste for domestic violence on our schools, hospitals and welfare provision.

“Surely, the Liberals will file for divorce as soon as the bruises start to show through the make-up?”

But never fear! He did eventually issue a non-apology for his offensive comments, with the classic use of “if”:

“I apologise if anyone has been offended by the metaphorical reference in this article, which I will now be editing. The reference was in a phrase describing today's Tory and Liberal cuts to domestic spending on schools and welfare as metaphorical ‘domestic violence’.”

***

A one-off sexist gaffe is bad enough in a wannabe future Labour leader. But your mole sniffs a worrying pattern in this list that suggests Smith doesn’t have a huge amount of respect for women, when it comes to political rhetoric at least. And it won’t do him any electoral favours either – it makes his condemnation of Corbynite nastiness ring rather hollow.

I'm a mole, innit.