We characterize all anonymous VCG mechanisms by using queue efficiency, strategyproofness and equal treatment of equals. By additionally imposing independence axioms, introduced by Chun (2006a) and Maniquet (2003), we characterize the pivotal and the reward-based pivotal mechanisms in the class...

We introduce a family of sequential contributions rules for minimum cost spanning tree problems. Each member of the family assigns an agent part of the cost of connecting him to his immediate predecessor, and all of his followers are equally responsible for the remaining part. We characterize...