Research:How do culture and geography affect newbie retention?

This question set is among the high level research priorities for the Wikimedia Summer of Research 2011. The full list is here, and this is categorized as "RQ4".


(RQ4.1) How many new or experienced editors to a single particular language of Wikipedia come from different geographic locales? Question has generally been ruled out, since only way to acquire this data is via polling/surveys which are naturally incomplete. Even with access to private data through the Foundation, historical IP data is not retained past 90 days.

(RQ4.2) How successful are editors who self-identify as being from particular locales at mentoring - or at least not biting - new editors? Per above.

(RQ4.3) How much bilingual/cross-wiki activity is there among active registered editors? [1]