Fake news does not only disrupt society but also economy and the deep roots of democracy. Sometimes, their impact can even be measured in terms of people killed by the misinformation that it’s spread around.

Sinan Aral, a scientist, entrepreneur and investor with a PhD in IT economics, applied econometrics and statistics, has run some of the largest randomised experiments in digital social networks like Facebook and Twitter to measure the impact of persuasive messages and peer influence on our economy, our society and our public health.