Rising political polarization is, in part, attributed to the fragmentation of news media and the
spread of misinformation on social media. Previous reviews have yet to assess the full …

One of today's most controversial and consequential issues is whether the global uptake of
digital media is causally related to a decline in democracy. We conducted a systematic …

We address the diffusion of information about the COVID-19 with a massive data analysis on
Twitter, Instagram, YouTube, Reddit and Gab. We analyze engagement and interest in the …

Social media allows people to freely interact with others and offers multiple ways for
marketers to reach and engage with consumers. Considering the numerous ways social …

Political polarization, a concern in many countries, is especially acrimonious in the United
States (see the first box). For decades, scholars have studied polarization as an ideological …

There has been growing concern about the role social media plays in political polarization.
We investigated whether out-group animosity was particularly successful at generating …

We investigated the effects of Facebook's and Instagram's feed algorithms during the 2020
US election. We assigned a sample of consenting users to reverse-chronologically-ordered …

Does the consumption of ideologically congruent news on social media exacerbate
polarization? I estimate the effects of social media news exposure by conducting a large …

Politics has in recent decades entered an era of intense polarization. Explanations have
implicated digital media, with the so-called echo chamber remaining a dominant causal …

Content on Twitter's home timeline is selected and ordered by personalization algorithms.
By consistently ranking certain content higher, these algorithms may amplify some …