EFFECTS OF ELITE BIAS THROUGH MEDIA informed elite models: Schumpeter Berelson Neuman Page and Shapiro's collective rationality elites have more info than the masses: Delli Carpini and Keeter 1997 Zaller 1992 elite framing effects suggest manipulation: Zaller 1992 Farr 1993 Parenti 1999 Druckman 2001c