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Vaccine hesitancy and (fake) news: Quasi‐experimental evidence from Italy

Vincenzo Carrieri (), Leonardo Madio () and Francesco Principe ()

Health Economics, 2019, vol. 28, issue 11, 1377-1382

Abstract: The spread of fake news and misinformation on social media is blamed as a primary cause of vaccine hesitancy, which is one of the major threats to global health, according to the World Health Organization. This paper studies the effect of the diffusion of misinformation on immunization rates in Italy by exploiting a quasi‐experiment that occurred in 2012, when the Court of Rimini officially recognized a causal link between the measles‐mumps‐rubella vaccine and autism and awarded injury compensation. To this end, we exploit the virality of misinformation following the 2012 Italian court's ruling, along with the intensity of exposure to nontraditional media driven by regional infrastructural differences in Internet broadband coverage. Using a Difference‐in‐Differences regression on regional panel data, we show that the spread of this news resulted in a decrease in child immunization rates for all types of vaccines.

Date: 2019
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https://doi.org/10.1002/hec.3937

Related works:
Working Paper: Vaccine hesitancy and (fake) news: quasi experimental evidence from Italy (2019)
Working Paper: Vaccine Hesitancy and Fake News: Quasi-experimental Evidence from Italy (2019) Downloads
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