NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Cindy Paladines

The World Bank
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Washington, DC 20433

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Institutional Affiliation: World Bank

NBER Working Papers and Publications

February 2019When Celebrities Speak: A Nationwide Twitter Experiment Promoting Vaccination In Indonesia
with Vivi Alatas, Arun G. Chandrasekhar, Markus Mobius, Benjamin A. Olken: w25589
Celebrity endorsements are often sought to influence public opinion. We ask whether celebrity endorsement per se has an effect beyond the fact that their statements are seen by many, and whether on net their statements actually lead people to change their beliefs. To do so, we conducted a nationwide Twitter experiment in Indonesia with 46 high-profile celebrities and organizations, with a total of 7.8 million followers, who agreed to let us randomly tweet or retweet content promoting immunization from their accounts. Our design exploits the structure of what information is passed on along a retweet chain on Twitter to parse reach versus endorsement effects. Endorsements matter: tweets that users can identify as being originated by a celebrity are far more likely to be liked or retweeted by...
 
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