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How to measure cohort retention
A deep dive into the formulas, visualizations, and SQL you need to accurately measure and report on cohort retention—a guest post by Olga Berezovsky
Published on Lenny's Newsletter • 
Why it’s wrong to run A/B test for too long - Issue 213
The risks of extending the A/B test timeline or why duration matters.
 • 
Olga Berezovsky
What Is the Optimal Free Trial Length? - Issue 212
How long the trial period for subscriptions should be - data and case studies.
 • 
Olga Berezovsky
1
Data Analysis in Python: A Guide to Working With Dates in Pandas - Issue 211
A quick datetime reference guide for handling and parsing dates in Python Pandas.
 • 
Olga Berezovsky

June 2024

Building BI: Behind The Scenes | Benn Stancil
Interviewing Benn Stancil: BI landscape and emerging trends in analytics
 • 
Olga Berezovsky
 and 
Benn Stancil
1
WWDC 2024 Recap: Top Announcements Impacting Analytics - Issue 209
What you need to know from recent key updates from Apple and how they impact app analytics
 • 
Olga Berezovsky
How To Make A Sandwich in 587 Steps - Issue 208
Or why Customer Data Platform may not be the solution you need.
 • 
Olga Berezovsky
May Digest: Navigating Through Data and Analytics Snowstorm
Case studies, analyses, new tutorials, and everything important you may have missed last month.
 • 
Olga Berezovsky
 and 
timo dechau 🕹🛠
1
Ranking The Top Used Product Features - Issue 206
How to locate the most frequently used product features to learn which features drive the highest user engagement in the app.
 • 
Olga Berezovsky

May 2024

A Guide to Measuring Feature Contribution to KPIs
Four Causal Analyses That Will Drive Your Next Promotion: A Guest Post by Tom Laufer, CEO & Co-founder of Loops
 • 
Olga Berezovsky
 and 
Tom Laufer
Introduction To Proxy Metrics - Issue 204
A guide to identifying and implementing effective proxy metrics with examples and use cases.
 • 
Olga Berezovsky
What Is the Best Advice You Have Ever Received? - Issue 203
What changed or transformed your career? Take some advice from data and analytics leaders.
 • 
Olga Berezovsky
© 2024 Olga Berezovsky
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