We experimentally show that current models of reciprocity are in-complete in a systematic way using a new variant of the ultimatumgame that provides second-movers with a marginal-cost-free punish-ment option. For a substantial proportion of the population, the de-gree of first-mover unkindness...

A small lie appears trivial but it obviously violates moral commandments. We analyze whetherthe preference for others’ truth telling is absolute or depends on the size of a lie. In a laboratoryexperiment we compare punishment for different sizes of lies controlling for the resultingeconomic...