Retention windows after first purchase
A 14-day window flatters fashion and starves grocery. How to pick a window your holdout can actually use.
Journal
Desk notes, not thought leadership.
Short pieces we actually use in Cohort Signal Architecture and the Quiet-Hour Calibration Lab. If a post cites a number, it is from a teaching example or a published alumni board — not a recycled benchmark.
Quiet hours and send fatigue
An overlay for Thailand’s evening peak and the fatigue score we mark in the lab.
Measuring lifecycle lift without vanity metrics
Opens are a lighting condition. Repurchase, reply, and unsubscribe slopes are the work.
When suppression is the growth move
Cutting a Friday night series is not “giving up on CRM.” Sometimes it is the only honest lift.