This paper addresses the existence of Nash equilibria in one-way flow or directed network models in a number of different settings. In these models players form costly links with other players and obtain resources from them through the directed path connecting them. We find that heterogeneity in...

We consider a model of an information network where nodes can fail and transmission of information is costly. The formation of paths in such networks is modeled as the Nash equilibrium of an N player routing game. The task of obtaining this equilibrium is shown to be NP-Hard. We derive...

We extend the model of friendship networks developed by Brueck-ner (2006) in two ways. First, we extend the level of indirect bene…tsby incorporating bene…ts from up to three links and explore its impli-cation for the socially optimal and individual e¤ort levels. Next, wegeneralize the...