Is there an omission effect in prosocial behavior beyond the default effect?

We test whether there is an omission effect in prosocial choices beyond the default effect. To isolate the omission effect from the default effect, we conduct two incentivized resource allocation experiments. In these experiments, participants choose between two allocations of money between themselves and another participant: one selfish allocation and one fair allocation. Our treatments manipulate whether a selfish default is chosen passively or actively. We find no evidence that the distinction between omissions and commissions has an independent effect on the propensity to implement selfish outcomes.