 Overall, according one review of the literature, giving in dictator games amounts to roughly 15–20% of what a participant receives in the first place (Camerer 2003: 57–58), which is less than fair but more than completely self-interested. As a quick aside, it is worth noting the implicit assumption in much of this literature that a 50/50 split is the fair distribution, whereas keeping most of the money for oneself would be considered unfair. Philosophically this might be a contested matter, and there could also be some variability in terms of which cultures tend to accept this assumption more so than others.