This paper reports data from an ultimatum mini-game in which responders first had to choose whether or not to participate. Participation was costly, but the participation cost was smaller than the minimum payoff that a responder could guarantee himself in the ultimatum game. Compared to a...

The data reported in this paper show that in an ultimatum mini-game rejection rates of low offers are significantly reduced if participation for responders is voluntary but costly. A possible explanation based on cognitive dissonance and loss aversion is offered.

This paper reports data from an ultimatum mini-game in which responders first had to choose whether or not to participate. Participation was costly, but the participation cost was smaller than the minimum payoff that a responder could guarantee himself in the ultimatum game. Compared to a...