M39H: F1 Score Up 9%, CSAT Down 19% for Meta's Anti-Scam Detector. Is the System to Blame?
How to tell precision decay from a visibility problem in safety metrics
Lewis C. Lin’s Newsletter
Think like a world-class product leader in 15 minutes. I take you through product deep dives and leadership insights that turn ambitious professionals into executives.
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Latest posts
🤔 Dear Lewis, How Do I Handle a Chronic Deadline Dodger Without Micromanaging?
In today’s edition, a VP struggles with a brilliant team that can’t meet deadlines. Discover the simple framework that transformed them into deadline-dominators.
M39B: Deciding between Recall vs. Precision for Meta's Anti-Scam Detection
Why catching more scams can make the safety score worse
D12: Improve Discoverability on Airbnb
How to fix browse when guests don't know where they're going
1:1 Coaching Waitlist Now Open
Limited spots. Closes Tuesday, August 19 at 11:59 PM PT.
M34H: Diagnosing Why Group Participation Rate Is Up While New Group Creation Is Down for FB Groups
How to catch a participation metric propped up by a shrinking denominator
M30H: Diagnosing Why Events Created Is Up While Repeat Event Creator Rate Is Down for FB Events
How to tell a maturing cohort from a real organizer exodus
M41N: Measuring Success for Netflix's Recommendation System
How to break a near tie between two Netflix metrics
M30B: Deciding between Depth vs. Breadth in Facebook Groups
How to choose between depth and breadth when both drive engagement
🤔 Dear Lewis, am I imagining it or do people resent my success?
When your professional success starts making networking feel like navigating a minefield, you're paying what I call the Celebrity Tax.
M41H: Netflix CTR Is Up 40%, Session Length Down 18%. What's Breaking?
How to test whether an algorithm gain is real or manufactured
M55: Designing a Product for Disney Theme Parks
Why the plan needs to heal itself, not the parent rebuilding it.