Centrality measures play a key role in network analysis. This paper studies the extent to which these measures share a common structure. In contrast with prior work, I take an ordinal approach, considering preorders on the vertex set of a graph that satisfy an intuitive axiom called recursive...

We consider decentralized platforms facilitating many-to-many matches between two sides of a marketplace. In the absence of direct matching, inefficiency in market outcomes can easily arise. For instance, popular supply agents may garner many units from the demand side, while other supply units...