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This first study will show whether new users who receive Echo notifications become more productive than new users who don't have Echo. This would let us determine whether or not Echo is helping engage users who receive notifications more than other users.

This would be done by bucketing two user groups (new users with Echo and new users without Echo), and results would be based on total edits (or if time allows, number of edits that were not reverted within a week). 

Some instrumentation will be needed on edit pages, as we have done for similar studies in the past.

Read preliminary requirements here:

http://www.mediawiki.org/wiki/Echo/Metrics#Productivity_Cohort_Study

Final requirements to be provided by Dario Taraborelli, who will spearhead this study, in collaboration with members of the E3 team.