Public Discourse in USA since 1960
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The title of his lecture is: "Revealing, Disclosing, and Accounting: Some Features of American Public Discourse Since 1960". I imagine he will be using (and most problably criticizing) Habermas concepts around the Public Sphere in relation to his research on recent Public Discourse in the USA. I am looking forward to it.
If you want to read a sound and original Keynote Lecture delivered by Schudson in 1999 here is the link