This paper studies collective choice rules whose outcomes consist of a collection of simultaneous decisions, each one of which is the only concern of some group of individuals in society. The need for such rules arises in different contexts, including the establishment of jurisdictions, the...

We present a model of cooperative production in which rational agents might carry out sabotage activities that decrease output. We provide necessary and su cient conditions for the existence of a Nash equilibrium without sabotage. It is shown that the absence of sabotage in equilibrium depends...

This paper proposes an argument that explains incumbency advantage with- out recurring to the collective irresponsibility of legislatures. For that purpose, we exploit the informational value of incumbency: incumbency confers voters informa- ion about governing politicians not available from...