In a recent editorial in The Washington Post, western China scholars were taken to task for engaging in self-censorship:

When it comes to China, Americans are victims of an insidious kind of censorship that stunts the debate they hear and read about in nearly invisible ways…  The upshot [of fear of visa denials, concern that university administrators will be upset, and worry that Chinese colleagues will be harmed] is that America’s… leading experts on China often remain silent as its regime becomes ever more repressive. (The Washington Post, September 23, 2018)

Where is the evidence? Professors Rory Truex and Sheena Greitens, fellows in the National Committee’s Public Intellectuals Program (PIP), conducted a study to assess the extent of repression in the China field. On October 22, 2018, Professor Truex presented their findings, and Columbia Law School Professor Benjamin Liebman, also a PIP fellow, served as commentator.