Emeric Henry, Ekaterina Zhuravskaya, Sergei Guriev, 21 May 2020

The most recent manifestations of populism owe a portion of their rise to social media and the unfettered spread of false and misleading narratives or, as they are sometimes called, ‘alternative facts’. This column makes use of an online experiment conducted among Facebook users in France during the 2019 European Parliament elections to show that fact-checking can staunch the flow of false information, as can the imposition of small costs such as requiring an additional click to confirm a user’s willingness to share news.

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