Ok. So far the "histogram_edits", "new_editor_count", "time_to_new_wikipedian" and "total_number_of_new_wikipedians" work for me, not sure that is enough yet to replicate the findings of the study. I'll be checking the others from time to time after an svn update.
Can you explain what these do? The histogram edits I guess gives the total number of edits for every year? The time to new wikipedian the average time to reach the 10th edit in seconds? And the new editor count and the total number of new wikipedians gives exactly the same results, the number of people who have reached 10 edits in a given year?