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 individual in society. The need for such rules arises in different contexts, including the establishment of jurisdictions, the...

This paper surveys selectively several contributions to the understanding of how cooperatives may cope with the interplay between meritocracy and efficiency when public decisions are taking by voting and the supply of labor is freely decided by each member. This outlines the main trade-off faced...

We model the decision problems faced by the members of societies whose new members are determined by vote. We adopt a number of simplifying assumptions: the founders and the candidates are fixed; the society operates for a fixed number of periods and holds elections at the beginning of each period;...