Lacetera, Nicola; Macis, Mario; Mele, Angelo - Institute for the Study of Labor (IZA) - 2014
's contacts. However, results from a field experiment where broadcasting of the initial pledges was randomized suggest that the … observational findings were likely due to homophily rather than genuine social contagion effects. The experiment also shows that … (30 out of 6.4 million users reached) were made. Finally, an online survey experiment showed that both the presence of an …
