3 ms·

Wow, they completely exposed their data set. Don't see many companies giving away cohort retention details like this.

• chrismiller 16y ago
  The post was written by a 3rd party and not Instagram. The last section of the article explains how they managed to get the data: "Four things allowed us to conduct this analysis: Instagram’s new API, their use of incrementing ID numbers to represent users and photos, the central limit theorem"
  • dreamux 16y ago
    Unfortunately, this isn't very rigorous - the dataset can easily be gamed by instagram.
    • ajays 16y ago
      If the Instagram guys have read this http://en.wikipedia.org/wiki/German_tank_problem http://en.wikipedia.org/wiki/German_tank_problem , they might be having a good laugh...
  • naithemilkman 16y ago
    Well my point was more that Instagram exposed enough data such that RJ Metrics were able to get access to enough information to extrapolate the cohort retention rates.