Fair Allocation of Group Tasks According to Social Norms

We consider the problem of decomposing a group norm into a set of individual obligations for the agents comprising the group, such that if the individual obligations are fulfilled, the group obligation is fulfilled. Such an assignment of tasks to agents is often subject to additional social or organisational norms that specify permissible ways in which tasks can be assigned. An important type of social norms are ‘fairness constraints’, that seek to distribute individual responsibility for discharging the group norm in a ‘fair’ or ‘equitable’ way. We propose a simple language for this kind of fairness constraints and analyse the problem of computing a fair decomposition of a group obligation, both for nonrepeating and for repeating group obligations.