We consider collective choice problems where a set of agents have to choose an alternative from a finite set and agents may or may not become users of the chosen alternative. An allocation is a pair given by the chosen alternative and the set of its users. Agents have gregarious preferences over...

We study efficiency and fairness properties of the equal cost sharing with maximal participation (ECSMP) mechanism in the provision of a binary and excludable public good. According to the maximal welfare loss criterion, the ECSMP is optimal within the class of strategyproof, individually...

We present an electoral theory on the public provision of local public goods to an imperfectly informed electorate. We show that electoral incentives lead to greater spending if the electorate is not well informed. A more informed electorate induces candidates to target funds only to specific...

In this paper we look for a solution to a land division problem that could be applied to different types of disputes when the arbitrator has a very limited information about the agents' preferences. The solution must be fair and efficient under the constraint of the limited information available...