2.2.2. Ultimatum Game

For the second and third task, subjects were to make a decision first as *proposer* and later as *recipient* in the *ultimatum game*. The *proposer* is endowed with DKK 100 and chooses how much to offer (in increments of DKK 10) the *recipient*. The *recipient* indicates the minimum amount (acceptance threshold), she is willing to accept (in increments of DKK 10). If the offer is accepted, the proposed allocation is realized, and if the offer is rejected, both the *proposer* and the *recipient* receive nothing.

The strategy method [16] is employed to the *recipient's* decision because the sampling procedure allowed players to enter their choices at different time points. Even though applying the strategy method was necessary in this case, it is useful in the *ultimatum game*, since most offers are close to equal splits which means that there are few rejections, and thereby the actually relevant choices provide little information regarding the willingness to accept or reject low offers [17].
