Note that "editing session" is not at all similar to an "edit session" from this:

Geiger, R. S., & Halfaker, A. (2013, February). Using edit sessions to measure participation in Wikipedia. In Proceedings of the 2013 conference on Computer supported cooperative work (pp. 861-870). ACM. http://www-users.cs.umn.edu/~halfak/publications/Using_Edit_Sessions_to_Measure_Participation_in_Wikipedia/geiger13using-preprint.pdf

On Thu, Mar 23, 2017 at 9:55 AM, Nuria Ruiz <nuria@wikimedia.org> wrote:
>·         Average hours of spent by editors by segment (5+ edits and 100+ edits)?
We do not keep track of session length per editor thus this data is not available.
The most similar thing I can think of is session length of editing session which is quite different. That is a heavily sampled metric that is reported via eventlogging, some related data is reported here: https://edit-analysis.wmflabs.org/compare/

On Wed, Mar 22, 2017 at 5:03 PM, Federico Leva (Nemo) <nemowiki@gmail.com> wrote:
Aaron Halfaker, 22/03/2017 22:43:
__·         __Number of editors who contribute 1 edit per month? __

First column of https://stats.wikimedia.org/EN/TablesWikimediaAllProjects.htm .

__·         Is it possible/feasible to run editor retention metrics
globally (versus just based on a single project?

This depends if one just wants to (deduplicate and) sum different projects, or also consider interwiki events (such as a person stopping activity on a wiki but resuming activity on another wiki). I remember something was done a few years ago to see if Wikidata removed active editors from other projects and a few "migration" paths were identified in all directions. I can't find the chart/table now though.

__·         __Total number of editors on all projects over the past 16
years (not just ENWP)?____

For a quick estimate I usually make a proportion https://stats.wikimedia.org/EN/TablesWikipediaEN.htm#editor_activity_levels : https://stats.wikimedia.org/EN/TablesWikimediaAllProjects.htm ~ https://stats.wikimedia.org/EN/TablesWikipediaEN.htm#editdistribution : x . If the active editors in most classes are about 1 : 2, then probably the total number of editors in all Wikipedias + all other project is more than twice the English Wikipedia's total e.g. over 10 millions (or over 2 millions if you consider the usual 10 edits threshold).


__·         __Global distribution of editors by region (or country),
2016

https://web.archive.org/web/20161024063241/https://stats.wikimedia.org/wikimedia/squids/SquidReportPageEditsPerCountryOverview.htm + https://web.archive.org/web/20161002042707/https://stats.wikimedia.org/wikimedia/squids/SquidReportPageEditsPerCountryBreakdown.htm ?

Nemo




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