Media Historian Erik Barnouw.

We remember one of the most respected historians of the media Erik Barnouw. He died last week at the age of 93. He was the author of the classic three-volume History of Broadcasting. Barnouw was the first chief of the Library of Congress' Motion Picture, Broadcasting, and Recording Sound Division. In 1996 Barnouw wrote a memoir about his life, Media Marathon: A 20th Century Memoir.

Historian Erik Barnouw's new book looks into how the dawn of trick cinema and depictions of magic in films undermined the popularity of live magic shows. He later talks to Terry Gross about the pressure television broadcasters experience from boycotts and sponsors to highlight or remove certain kinds of content.

Scholar and writer Erik Barnouw discusses how advertising and demographic targeting has influenced television programming.