TY  - JOUR
T1  - Measuring Media Exposure and the Effects of Negative Campaign Ads
AU  - Freedman, Paul
AU  - Goldstein, Kenneth M.
PY  - 1999
SP  - 1189
EP  - 1208
JO  - American Journal of Political Science
VL  - 43
IS  - 4
SN  - 0092-5853
UR  - http://www.jstor.org/stable/2991823
ER  -