Gresham's Law of Political Communication: How Citizens Respond to Conflicting Information

34 Pages Posted: 29 Sep 2007 Last revised: 17 May 2011

Date Written: May 17, 2011


Although citizens are often exposed to conflicting communications from political elites, few studies examine the effects of conflicting information on the quality of citizens’ decisions. Thus, I conduct experiments in which subjects are exposed to conflicting information before making decisions that affect their future welfare. The results suggest that a version of Gresham’s Law operates in the context of political communication. When a credible source of information suggests the welfare-improving choice and a less credible source simultaneously suggests a choice that will make subjects worse off, subjects make worse decisions than when only the credible source is available. This occurs because subjects base their decisions upon the less credible source or forego participation. This occurs mostly among unsophisticated subjects, who are more easily led astray. These findings reveal important limits to the effectiveness of credible information sources and suggest how political campaigns might strategically use conflicting information to their benefit.

Keywords: communication, conflicting information, decision making, sophistication, laboratory experiment, trust, endorsement, credibility

JEL Classification: C9, C90, C91, D72, D81, D80, D83

Suggested Citation

Boudreau, Cheryl, Gresham's Law of Political Communication: How Citizens Respond to Conflicting Information (May 17, 2011). Available at SSRN: or

Cheryl Boudreau (Contact Author)

University of California, Davis ( email )

One Shields Avenue
Davis, CA 95616
United States

Register to save articles to
your library


Paper statistics

Abstract Views
PlumX Metrics