**4. Results**

A total of 295 subjects completed the study. The main sample consists of 236 observations, for which all variables of interest are available. Of the 236 subjects in the main sample, 124 (52.5%) were male subjects (one subject did not state gender). 214 of the subjects were students at the faculty of Business and Social Sciences at Aarhus University, which leaves a minority from other faculties. This is not surprising, because the courses where the study was advertised are available in the faculty of Business and Social Sciences.

In each task, a few subjects chose the opposite extreme of strict self-interest (transferring DKK 100 in the *dictator game* and offering DKK 100 in the *ultimatum game* and accepting no less than DKK 100 in the *ultimatum game*). These "outliers" are included in the analysis. Excluding them does not alter the findings.
