I was looking around on Omnifile and found this excerpt from an interview with Delillo in a book review--
"He has admitted to being strongly influenced by the cinematic techniques of Jean-Luc Godard, and in an interview with Tom LeClair (referred to in LeClair's very interesting book on DeLillo called In the Loop), DeLillo said that the cinematic qualities which influenced his writing were "the strong image, the short ambiguous scene...the artificiality, the arbitrary choices of some directors, the cutting and editing."
The reviewer is convinced that the "arbitrary" component of Delillo's backwards swerves in time is actually the dominant component of the entire scheme, and presently, I'm inclined to side with him. There is some commentary about how the backwards motion through time suggests that such a progression is how history can be best understood, but does a deeper rationale exist? Do you think there are other reasons for breaking the novel up into its respective times and locales?