Thanks, Nemo -- this [1] is really interesting info. Particularly, the demographics could be compared to Geiger & Ford "Participation in Wikipedia's Article Deletion Processes" WikiSym 2011: http://www.stuartgeiger.com/papers/article-deletion-wikisym-geiger-ford.pdf A few things I needed to figure out: Pdc ~= AfD English Wikipedia http://it.wikipedia.org/wiki/Wikipedia:Pagine_da_cancellare *total_count* : Total number of pdc created in that particular month *total_weight* : total size (in bytes) of the pdc opened during that month *total_users* : total number of participants in the pdc in that month *total_users_edits_range_X* : partitioning of the participants based on the number of edits . The calculation considers the edits in all our recording from *the day before the opening of the pdc* . If the user has participated in more pdc is considered as the reference date of the pdc older. The intervals considered are the following : < 50 , between 51 and 500 , between 501 and 5000 , > 5000 *total_users_age_range_X* : partitioning of the participants based on age. This is calculated as the difference between the record date and the date of *creation of the pdc* . If a user participates in more pdc is considered as the reference date of the pdc older. The ranges are : <6 months , between 6 and 12 months , between 1 and 2 years , between 2 to 3 years , > 3 years . *pdc_edits_avg* and *pdc_edits_std* : mean and variance of the number of edits to pdc . *users_edits_avg* and *users_edits_std* : mean and variance of the number of participants per pdc . Hope to take a closer look soon! -Jodi [1] https://toolserver.org/~mauro742/liste/pdc_stats.csv On Thu, Oct 3, 2013 at 3:25 PM, Federico Leva (Nemo) &lt;nemowiki(a)gmail.com&gt;wrote;wrote: