The very active are in the vast majority of cases still active - most
of the names near the top of this list
http://en.wikipedia.org/wiki/Wikipedia:EDITS [7] are blue linked
which
means they have edited recently. Earlier this year the number of
editor whod made over 100,000 edits on En Wiki grew to over 150 and
on
my projections there will be over 200 by the end of the year.
Now, I wanted to do it sometime, but your mail motivated me to do it
today.
I counted the number of inactive users per number of contributions,
taking numbers from the first 7000 in the list. Placeholders are counted
as inactive, and this is a clear drawback, but there are too few of them
to change the trend, and some of them may be inactive as well.
The results first.
Range (numbers) Range (edits) #inactive % inactive
1-200 over 93828 32 16
201-400 67561-93655 33 16.5
401-600 52024-67556 38 19
601-800 43587-51942 39 19.5
801-1000 37805-43432 51 20.5
1001-1200 33271-37791 61 30.5
1201-1400 30256-33260 54 27
1401-1600 27593-30250 50 25
1601-1800 25364-27571 60 30
1801-2000 23682-25360 80 40
2001-2500 19699-23574 174 34.8
2501-3000 17089-19697 167 33.4
3001-3500 14777-17086 191 38.2
3501-4000 13049-14777 199 39.8
4001-4500 11674-13048 225 45
4501-5000 10495-11673 195 39
5001-5500 9570-10495 211 42.2
5501-6000 8699-9569 224 44.8
6001-6500 8011-8697 239 47.8
6501-7000 7379-8011 242v 48.4
The first conclusion is that editors with over 35K edits are much less
likely to leave, increasingly unlikely as the # of edits goes up. This
is clearly statistically significant.
The second conclusion is that there is major loss of editors with about
20K edits. I am not sure how statistically significant this is.
I obviously did not try to correlate this with the lifetime, but if we
take 10K edits per year as an example, 2 years would be the most
probable lifetime. Richard Rohde reported slightly higher numbers.
So, yes, indeed, the editors leave after a couple of years, and they do
not get replaced.
Cheers
Yaroslav
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