This, from a recent article in Science, examining word usage frequencies using Google's huge corpus of books:
We probed the impact of censorship on a person’s cultural influence in Nazi Germany. Led by such figures as the librarian Wolfgang Hermann, the Nazis created lists of authors and artists whose “undesirable”, “degenerate” work was banned from libraries and museums and publicly burned (26-28). We plotted median usage in German for five such lists: artists (100 names), as well as writers of Literature (147), Politics (117), History (53), and Philosophy (35) (Fig 4E). We also included a collection of Nazi party members [547 names, ref (7)]. The five suppressed groups exhibited a decline. This decline was modest for writers of history (9%) and literature (27%), but pronounced in politics (60%), philosophy (76%), and art (56%). The only group whose signal increased during the Third Reich was the Nazi party members [a 500% increase; ref (7)].One interpretation, perhaps, is that philosophers socked it to Hitler and suffered most. However, given the rate at which philosophers appear to have co-operated with the Nazis (explored by George Leaman in Heidegger im Kontext and hopefully subject of a future post), I don't think we should rule out another interpretation: Philosophers tended to accept the Nazi censorship and stopped referring to the censored authors, more so than academics in other fields.
I wonder if there is a way to tease these hypotheses apart....
HT: Bernie Kobes.