Nicklisch, Andreas; Wolff, Irenaeus - In: Journal of Economic Behavior & Organization 84 (2012) 3, pp. 892-905
We experimentally show that current models of reciprocity are incomplete in a systematic way using a new variant of the ultimatum game that provides second-movers with a marginal-cost-free punishment option. For a substantial proportion of the population, the degree of first-mover unkindness...