Jamieson, Kathleen Hall2023-05-222023-05-222013-10-012014-04-24https://repository.upenn.edu/handle/20.500.14332/2002This article argues that new media technologies are likely to elicit changes in the content, tone, and potential electoral impact of those campaign messages micro-targeted through them, with a resulting increase in the level of unaccountable, deceptive, pseudonymous campaigning. Access to data-mined information will increase the likelihood that the candidate with the larger warchest will gain an advantage by changing the composition of the electorate. In a world of micro-targeted messaging, reporters have greater difficulty holding sponsors accountable and policing deception.The final publication is available at www.degruyter.com.CommunicationSocial and Behavioral SciencesArticle