10 Comments
Sep 29Liked by Oliver Johnson

Recommender systems in general try to solve an "explore / exploit" problem; I sometimes wonder when I get a load of odd recommendations from one if it is actually trying to explore my preferences (since a non-click is informative) more than it thinks I'd like the content.

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That's a cheerful thought, isn't it? (And yes, I realise that it's all a bit more complicated than I gave myself space to get into here!)

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Sep 29Liked by Oliver Johnson

For some reason, this reminded me of a very sharp Ian Leslie essay from nearly a decade ago about the problems with targeted digital ads:

https://www.ft.com/content/cd1722ba-8333-11e5-8e80-1574112844fd

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Interesting, thanks - I hadn't seen that. It's certainly the case that click-through rates are extremely low in general, and I think his explanation makes sense.

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Sep 29Liked by Oliver Johnson

Although it is obviously a bit dated now, I think it is still a very persuasive essay.

The 'light buyer' and the way that digital advertising is almost optimised not to reach them are quite counter-intuitive ideas, but have real explanatory power when you grasp them. People used to joke about how Amazon would see you had purchased a dehumidifier and conclude this was merely the start of a dehumidifier buying spree, but that is a very real online experience.

Vaguely related, this is a great Dan Davies essay (also nearly a decade old) - https://medium.com/bull-market/a-cynic-s-guide-to-fintech-3cd0995e0da3. Amongst other things, it sense checks the value of 'big data' by looking at the value of pure data analytics companies (fairly high, but not stratospheric).

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That's very interesting. Thanks for sharing. I think it still holds up pretty well.

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Sep 29Liked by Oliver Johnson

I must say you're a far less cynical person than I am. I don't think the algorithm is making a 'mistake' recommending you anti-vaxxers - I think it is deliberately designed to recommend us all nutcases because that drives outrage and therefore engagement.

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I agree that can be the effect, but I don't know if it's a deliberate thing. In fact I'm more worried about it sorting people into silos - when I first started using my alt account it was very keen for me to follow only COVID-cautious people for some reason for example, rather than mixing it up with provocations.

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Sep 29Liked by Oliver Johnson

"... we called these techniques ‘machine learning’ ... before people realised they could get bigger grants ... by calling them ‘artificial intelligence’" 😆

I regularly gently amuse myself by asking all 'AI Fanz' to explain how what they're proselytising differs from ML

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It's not a clear line in my mind, but I think there's maybe some kind of distinction just to do with the amount of computing power that's getting thrown at things these days. But I just wanted to remind people that deep down there's maths under the bonnet!

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