as well as the ticket tracking work on a Wikidata analytics dashboard [3]. However, after searching there and other usual places [4, 5, 6], I have not found a chart suitable for an "apples-to-apples" comparison between Wikidata and Wikipedia along the lines of Howie's famous graph.
The "Wikidata Active Editors" graph linked above seems to be the closest available resource for comparison, but it's missing half the data -- a line showing editor retention over time. Per [1], retention is defined as "the percentage of editors who first edited in the specified month and also went on to make at least one edit 12 months later."
Is data on editor retention in Wikidata available? If so, could someone point me to it?
