This paper is devoted to the study of opportunity sets comparisons when the sets may contain options whose characteristics are not completely known. We propose a suitable environment in which this problem can be approached, and provide axiomatic characterizations of several rules for ranking...

"We analyze a model in which voters are uncertain about the policy preferences of candidates. Two forces affect the probability of electoral success: proximity to the median voter and campaign contributions. First, we show how campaign contributions affect elections. Then we show how the...

This article analyses promotion tournaments where candidates engage in multiple tasks. We consider a promotion rule where the winner of the promotion tournament is randomly selected from the best performers at each task. The promotion tournament can achieve an efficient outcome for any...