This paper studies the implications of attempts at "ethnic-affinity" profiling on Facebook that reflects users' engagement with content on Facebook. Profiling by ethnic-affinity is highly correlated with Census estimates of population race by geography. However, more users were profiled as...

This paper investigates how internet users' perception of control over their personal information affects how likely they are to click on online advertising. The paper uses data from a randomized field experiment that examined the relative effectiveness of personalizing ad copy using posted...

Online sources sometimes publish information that is false or intentionally misleading. We study the role of social networks and advertising on social networks in the dissemination of false news stories about childhood vaccines. We document that anti-vaccine Facebook groups disseminate false...

This paper investigates the effectiveness of social media advertising and online video advertising using three large-scale controlled field experiments in the U.S., China and the Netherlands. The study was implemented using a technological approach that allows researchers to combine controls...

The use of testimonials from existing customers has always been an important technique in traditional marketing communications. However, it is not clear whether attempts by firms to promote customer testimonials in social media will be equally effective. First, often the reach of a firm on...

Online sources sometimes publish information that is false or intentionally misleading. We study the role of social networks and advertising on social networks in the dissemination of false news stories about childhood vaccines. We document that anti-vaccine Facebook groups disseminate false...