1. Exploring a professional social network system to support learning in the workplace / Anthony "Skip" Basiel, Paul Coyne -- 2. Knowledge producing megamachines : the biggest Web 2.0 communities of the future / Laszlo Z. Karvalics -- 3. Web 2.0 driven sustainability reporting / Daniel Süpke,...

In economic and social sciences it is crucial to test theoretical models against reliable and big enough databases. The general research challenge is to build up a well-structured database that suits well to the given research question and that is cost efficient at the same time. In this paper...