[Wikimedia-l] User retention statistics?

[Yaroslav M. Blanter]

Thank you all for the replies, I need some time to process this 
information.

Cheers
Yaroslav

>> 1. What is the average lifetime of a Wikipedia editor (for instance 
>> the
>> one with at leat 1000 contributions)? I recollect smth about two 
>> years, but
>> I am pretty sure I have never seen any research on this. How does it 
>> depend
>> on the number of contributions?
>>
>> 2. What are the main reasons why these editors stop editing? Is this
>> correct, for instance, that external reasons are much more important 
>> than
>> internal (on-wiki troubles and wiki-related harassment) reasons? The 
>> same
>> for say those above 10000 edits?
>>
>> Thanks in advance
>> Cheers
>> Yaroslav
>>
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