From collective to individual commitments

A collective obligation is an obligation aimed at a group of agents. It is formalized in a framework of deontic logic, which gives the opportunity to express which (sub-)group has the responsibility to bring about a certain situation and to express the relation between groups of agents. However, the individual responsibility that follows from the goal to achieve the fulfillment of the collective obligation cannot be expressed. A consequence is that the individual responsible for a violation of a collective obligation cannot be indicated. To deal with this, the notion of commitment in the context of collective obligation is investigated.