The need for negativity: an introduction
Assessing negativity
The information environment and negativity
Evaluating character attacks
Evaluating the content of negative and positive issue appeals
Dragging the truth into the gutter? The news media, negativity
And the 1988 campaign
Negativity, democracy, and the political system.
In defense of negativity : attack ads in presidential campaigns by John Gray Geer. ISBN 0226284999. Published by University of Chicago Press in 2006. Publication and catalogue information, links to buy online and reader comments.