%0 Journal Article
%T Measuring Media Exposure and the Effects of Negative Campaign Ads
%A Freedman, Paul
%A Goldstein, Kenneth M.
%D 1999
%P 1189-1208
%J American Journal of Political Science
%V 43
%I 4
%2 ISSN: 0092-5853
%U http://www.jstor.org/stable/2991823