Surveying Wikipedia activity: Collaboration, commercialism, and culture

User generated content has grown drastically on the Internet over the last years. In this paper, we take a look at Wikipedia and compare Wikipedia editing activity both against commercial content producers as well as across different cultures. Our results show that commercial news sites have a clear diurnal and weekday-weekend patterns, whereas Wikipedia editing has a clear diurnal pattern, but no discernible weekday-weekend pattern. We studied 4 different Wikipedias from 4 different languages and cultures and found out that the editing behavior is very similar across all of them.