Facebook is bringing monetization features into yet another part of its service: groups. The social network is testing new tools that allow group admins to make money, with new shopping, fundraising ...

The original version of this story appeared in Quanta Magazine. Mathematics started with numbers—clear, concrete, intuitive. Over the last two centuries, however, it has become a far more abstract ...

Citations: Lau, Dora, J. Keith Murnighan. 2005. Interactions within Groups and Subgroups: The Effects of Demographic Faultlines. Academy of Management Journal. (4)645 ...