Traditional social collaboration information systems like shared workspaces have been used for more than 20 years. More recently tools like wikis, blogs and online social networks have gained prominence and expanded the scope of collaboration technologies. In this paper, we study the relevance...

With crowd labor markets such as Amazon Mechanical Turk (MTurk for short), oDesk, or Clickworker, it is relatively easy to access a large, distributed workforce with different skill and pay levels on demand. The crowd processes tasks which range from simple repetitive email tagging to creative...