The document describes the results of several experiments testing what motivates people to donate online.
[1] An experiment with 3 celebrities and a friend asking their followers to donate found that the friend who asked their 200 friends raised the most at £800, more than the celebrities with thousands more followers.
[2] Feedback about the impact of donations did not motivate further donations on its own. Thank you notes only motivated more donations if they included the donor's name.
[3] An experiment offering previous donors the chance to double their donation for a royal wedding raised no additional funds, as people did not want to donate more than they originally intended.
The conclusion is that friends are the most effective motiv