We study a model of proportional representation, in which the policy space is multidimensional. We first show, via an example, that the assumption of quasi-concavity of the utility function is not sufficient to obtain the result that only the extreme parties get votes, contrary to the...

We analyze the economic aspects of corruption in public procurement. We describe the conditions necessary to corruption and develop five intermediary objectives in the task of fighting against corruption. We propose a mechanism that pursues such objectives.