In the minimum cost spanning tree model we consider decentralized pricing rules, i.e. rules that cover at least the efficient cost while the price charged to each user only depends upon his own connection costs. We define a canonical pricing rule and provide two axiomatic characterizations....

We consider the sharing of the cost of producing a homogeneous good when the technology has variable returns and individuals have arbitrary demands. We give a full analytical description of the family of costsharing methods that allocate costs in proportion to demands when returns are constant,...