Erik Bernhardsson    About

Books I read in 2015

Early last year when I left Spotify I decided to do more reading. I was planning to read at least one book per week and in particular I wanted to brush up on management, economics, and technology. 2015 was also a year of exclusively non-...

More MCMC – Analyzing a small dataset with 1-5 ratings

I’ve been obsessed with how to iterate quickly based on small scale feedback lately. One awesome website I encountered is Usability Hub which lets you run 5 second tests. Users see your site for 5 seconds and you can ask them free-form q...

There is no magic trick

(Warning: super speculative, feel free to ignore) As Yogi Berra said, “It’s tough to make predictions, especially about the future”. Unfortunately predicting is hard, and unsurprisingly people look for the Magic Trick™ that can resolve ...

Installing TensorFlow on AWS

Curious about Google’s newly released TensorFlow? I don’t have a beefy GPU machine, so I spent some time getting it to run on EC2. The steps on how to reproduce it are pretty brutal and I wouldn’t recommend going through it unless you wa...

Looking for smart people

I haven’t mentioned what I’m currently up to. Earlier this year I left Spotify to join a small startup called Better. We’re going after one of the biggest industries in the world that also turns out to be completely broken. The mortgage ...

MCMC for marketing data

The other day I was looking at marketing spend broken down by channel and wanted to compute some simple uncertainty estimates. I have data like this: Total spend Transactions ...

Interview with a Data Scientist: Erik Bernhardsson

I was featured in Peadar Coyle’s interview series interviewing various “data scientists” – which is kind of arguable since (a) all the other ppl in that series are much cooler than me (b) I’m not really a data scientist. Anyway, repostin...