In understanding Google’s decision to close their www.google.cn site, this is the most comprehensive article I have come across.
http://www.nytimes.com/2006/04/23/magazine/23google.html?emc=eta1
The article also gives a good insight to the workings of self-discipline (read self-censorship) or as Clive Thompson writes:
The Chinese system relies on a classic psychological truth: self-censorship is always far more comprehensive than . . . → Read More: Google in China and the art of self-discipline