Yes, I realize this isn't exactly search related but with so much recent attention about Google China not crawling certain news sites this new paper about Internet filtering and censorship might be of interest.
A Starting Point: Legal Implications of Internet Filtering
Source: Open Net Initiative
"In this paper, the Open Net Initiative (ONI) considers some of the legal implications of controlling access to Internet content through filtering. ONI -- a research partnership of the Berkman Center [Harvard University], University of Toronto's Citizen Lab, and the University of Cambridge -- documents Internet filtering by collecting empirical data about the parties who censor web traffic and the types of sites blocked in different countries. This paper considers the legal ramifications of this data."
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