Not surprisingly, some find fault with that assertion.“There is no scenario in which ‘user choices’ vs. ‘the algorithm’ can be traded off, because they happen together,” writes Christian Sandvig, an associate professor of Communication Studies and Information at the University of Michigan and associate at the Berkman Center for Internet & Society at Harvard University, on the blog of the Social Media Collective at Microsoft Research New England.

Source: SiliconBeat – Facebook study: Political echo chamber is users’ fault, not Facebook’s