Goette, Lorenz; Stutzer, Alois - Institute for the Study of Labor (IZA) - 2008
donations in a large-scale field experiment spanning three months and involving more than 10,000 previous donors. We examine two … types of incentive: a lottery ticket and a free cholesterol test. Lottery tickets significantly increase donations, in … anything, it creates a small negative selection effect in terms of donations that must be discarded. …