We study observational learning in environments with congestion costs: as more of one’s predecessors choose an action, the payoff from choosing that action decreases. Herds cannot occur if congestion on an action can get so large that an agent would prefer to take a different action no matter what his beliefs about the state. To the extent that “switching” away from the more popular action also...

The congested clique is a synchronous, message-passing model of distributed computing in which each computational unit (node) in each round can send message of O(log n) bits to each other node of the network, where n is the number of nodes. This model has been considered under two extreme scanarios: unicast or broadcast. In the unicast model, a node can send (possibly) different message to each...

Transport systems are full of interactions between the demand for travel and the supply costs. As the demand increases, congestion builds up in the network and the costs of travel increases. In response to increased costs of travel, people may alter their demand for travel in terms of change of route, departure-time, mode, or choose not to travel. This demand/supply interaction enables an econo...

Recent studies have shown that a non-negligible number of packets face multiple congested links on Internet paths. We investigate the impact of multiple congested links on Active Queue Management (AQM) techniques. We present the results of an ns-2 evaluation study of various AQM techniques that, in contrast to previous studies of AQM, uses a complex network topology including up to 3 congested ...

I the past most traffic control strategies have focused primarily on optimizing the operation of traffic facilities to serve a given and fixed amount of traffic flow. However, as the ultimate limit of such improvements is being approached, significant further improvements can only be achieved through the pursuit of different types of strategies. One such approach involves improved routing of tr...