We discuss nonparametric methods and statistical tests that are appropriate to assess poverty targeting in public programs. These methods explicitly account for the possibility that the population distributions of participants and non-participants cross. Crossing points provide us with upper...

Very poor households may be excluded from public programs intended for their benefit for a variety of reasons as lack information, a permanent residence or membershiip in social networks. We are interested in methods of testing for such exclusion based on independently drawn samples of program...

We study mechanism design in quasi-linear environments when there are two alternatives. We show that under a mild range condition, every implementable deterministic allocation rule is a generalized utility function maximizer. In unbounded domains, if we replace our range condition by an...

We provide axiomatic characterizations of two natural families of rules for aggregating equivalence relations: the family of join aggregators and the family of meet aggregators. The central conditions in these characterizations are two separability axioms. Disjunctive separability, neutrality,...