**Context**: In the [[ https://commons.wikimedia.org/wiki/File:Wikidata_Community_Survey_2021.pdf | 2021 Wikidata Community survey ]]we had more people stating they started in 2021 and 2020 than, let's say, in 2017. A plausible explanation is that people stop editing over time and that the likelihood that they stop editing is related to the time they already were editing. (Similar to the [[ https://en.wikipedia.org/wiki/Lindy_effect | Lindy Effect ]])
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**Question**: What is the relation between past length of participation in the Wikidata community and the likelihood to stop participating?
**Operationalization**:
* A user is active when they edited 5 times within a month
* The time of a user being active is their "streak" of subsequent months in which they are active
* We consider a user has left the project if they stop editing and never so far have become an active editor (+5 edits/month) again.
**Additional Questions**:
* How high is the likelihood to become an active editor again?
* For people who become active editors again, it would be interesting to understand the patterns: Do they leave for a year and start again? (Like parents taking a baby break) Do they stop for a month and continue? (maybe they were sick or so) etc. Different thresholds were proposed in [[ https://wikiworkshop.org/2021/papers/Wiki_Workshop_2021_paper_22.pdf | this paper ]], an extensive analysis of [[ https://arxiv.org/pdf/1411.2878.pdf | inter-activity time is published here ]]