Reletter
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A curated weekly newsletter with interesting reads at the intersection of experimentation, analytics and behavioral science. Get it in your mailbox on Monday.

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Substack
PricingOnly free issuesPublishesWeekly
Issues351Founded6 years agoLast Issue7 days ago
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Latest Issues

'Hello Power' — Digest 25, 2026

I had planned to be running a 30k UTMB Zugspitze trail run in Garmisch-Partenkirchen last weekend. Then my wife had a small accident (she’ll be fine) and that plan went out the window. With the extra time, I picked up The Decision Stack by...

7 days ago
1

'Art of setting metrics' — Digest 24, 2026

This week: six reads with a common theme: what we measure, when we stop, and whether going faster is always better. And as always the latest open roles for experimenters: more than 1k jobs this time.


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Convert...

14 days ago
9

'Maximize surprise ' — Digest 23, 2026

This week: a new formula for powering switchback experiments, why good metrics need to be able to surprise you, and what "done" actually means when you're shipping AI features. Plus the UK government using experimentation to fix public serv...

21 days ago
4

'Value of evidence-based decision making' — Digest 22, 2026

This week: how to value evidence-based decision making? A new paper has an answer. Also: LLM evals meet A/B testing, and why strong ideas don't need to ship immediately.

You'll also find 914 open roles, upcoming events, and a cartoon that...

a month ago
3
2

'ROI of experimentation' — Digest 21, 2026

Last week: I’ve been busy with hosting the experimentation conference at Booking. Will do a longer deepdive on all presentation later, but overall it was a great success. This Thursday I’ll give a talk at the Optimization Meetup Utrecht. Th...

a month ago
3

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  • Kevin Anderson

    Product and experimentation leader. Writes the weekly Experimental Mind newsletter. Co-founder ExperimentationJobs.com.

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