Anonymous Communication for Encouragingthe Reporting of Wrongdoing in Social Groups

摘要

We propose an application of DC-net called Layered DC-net for encouraging the reporting of wrongdoing in social groups. A social group is a set of individuals, structured into lay-ered subgroups. Individuals are divided into subgroups called lower groups. One of the individuals in each lower group is a rep-resentative who has authority and responsibility for the lower group. The set of all representatives from all lower groups is called the upper group. In social groups, wrongdoing (e.g., bully-ing in schools) occasionally occurs. If individuals in a lower group discover wrongdoing, they should report it to their representative. Meanwhile, all representatives are responsible for settling wrongdoing. However, once individuals reporting such wrong-doing and their representative are identified, the payoffs for both are smaller than those for individuals who do not report it. We focus on reporting bullying in a school as an example of reporting wrongdoing in social groups. By using game theory, we formulate a game among bystanders of bullying in a lower group and an-other game among teachers in the upper group. We evaluate the games with and without the Layered DC-net. The results show that the Layered DC-net implements the Nash equilibria that encourage the reporting of wrongdoing in both lower and upper groups and settles wrongdoing in the social group.