The present study aimed at exploring the extent to which users model their behavior—as well as their brand attitudes, their perception of relationship quality, their use of Instagram, and the number of brands they follow—on other users. This distinction can help marketers and social media...

I propose a social learning model that investigates how confirmatory bias affects public opinion when agents exchange information over a social network. For that, besides exchanging opinions with friends, individuals observe a public sequence of potentially ambiguous signals and they interpret...

We present preliminary results from a small-scale natural field experiment aimed at exploring online social contagion, with an application to charitable giving. We worked in partnership with Heifer International, a non-profit organization aimed at fighting poverty in developing countries, and...

The authors study the effect of word-of-mouth (WOM) marketing on member growth at an Internet social networking site and compare it with traditional marketing vehicles. Because social network sites record the electronic invitations sent out by existing members, outbound WOM may be precisely...