Membership turnover in long-duration editorial groups

Investigate whether Wikipedia editorial groups associated with very long-duration episodes exhibit significant turnover in membership over time, despite the observed statistical constancy of group size.

Background

The analysis reveals at least two distinct clusters of episode durations and observes that group size remains statistically constant even over longer interactions. However, it is unclear whether the composition of these long-duration groups remains stable or changes substantially over time.

Clarifying the degree of membership turnover in long-duration episodes would refine the understanding of how persistent editorial activity is sustained and whether apparent stability in size masks underlying churn in participants.