Terry Gross

Pack Underhill studies what is called retail anthropology, in which he tracks the habits of shoppers in order to learn the best way to convince them to make a purchase. His retail consulting firm, Envirosell, has helped big-name companies such as McDonald's, Levi Strauss, and Blockbuster to study their customers browsing and buying routines.

Ballard's novels often deal with the changes affected by modern science and technology. His novel "Crash" relates these changes to sexually-deviant behavior. The book has been made into a movie by filmmaker David Cronenberg and won an award at the 1996 Cannes Film Festiival. Ballard also wrote the books "Empire of the Sun" and "Concrete Island," among others.

Commentator Gerald Early tells us why he was unsatisfied with "When We Were Kings" the Oscar-award winning documentary about the classic showdown between Muhammad Ali and George Forman in 1974 in Zaire.