Can Celebrity Endorsements Affect Political Outcomes? Evidence from the 2008 US Democratic Presidential Primary

Craig Garthwaite and Timothy Moore

The Journal of Law, Economics, and Organization, 2013, vol. 29, issue 2, 355-384

Abstract: Identifying the effects of political endorsements has historically been difficult. Before the 2008 Democratic presidential primary, Barack Obama was endorsed by talk show host Oprah Winfrey. In this article, we assess the impact of this endorsement using, as measures of Winfrey's influence, subscriptions to her magazine and sales of books she recommends. We find that her endorsement increased Obama's votes and financial contributions, and also increased overall voter turnout. No connection is found between the measures of Oprah's influence and previous elections, nor with underlying political preferences. Our results suggest that Winfrey's endorsement was responsible for approximately 1 million additional votes for Obama. The Author 2012. Published by Oxford University Press on behalf of Yale University. All rights reserved. For Permissions, please email: journals.permissions@oup.com, Oxford University Press.

Date: 2013
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