I'm a data scientist in Berlin. I write about statistics and experimentation, and separately about politics, literature and how to live. More about me.
CUPED — making your A/B tests more sensitive
26 September 2026
How pre-experiment data can help you detect smaller effects with fewer users.
13 June 2025
A common misdiagnosis in A/B test results, and how to tell the difference.
Sequential testing — making decisions before your experiment ends
29 May 2025
Why peeking at results inflates your false positive rate, and how sequential testing fixes it.
05 February 2026
Why do we suddenly all wear jeans now?
10 January 2026
Project Management is better in Docs
08 January 2026
You cannot simply 'change your beliefs' to become successful.
04 January 2026
02 January 2026