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We survey the literatures on the economic consequences of the structure of social networks. We develop a taxonomy of 'macro' and 'micro' characteristics of social inter-action networks and discuss both the theoretical and empirical findings concerning the role of those characteristics in...
Persistent link: https://www.econbiz.de/10011165640
We examine the spread of a disease or behavior through a social network. In particular, we analyze how infection rates depend on the distribution of degrees (numbers of links) among the nodes in the network. We introduce new techniques using first- and second order stochastic dominance...
Persistent link: https://www.econbiz.de/10005086847
Homophily, the tendency of linked agents to have similar characteristics, is an im- portant feature of social networks. We present a new model of network formation that allows the linking process to depend on individuals types and study the impact of such a bias on the network structure. Our...
Persistent link: https://www.econbiz.de/10005017526
We consider an environment where individuals sequentially choose among several actions. The payoff to an individual depends on her action choice, the state of the world, and an idiosyncratic, privately observed preference shock. Under weak conditions, as the number of individuals increases, the...
Persistent link: https://www.econbiz.de/10005654667
We consider an environment where individuals sequentially choose among several actions. The payoff to an individual depends on her action choice, the state of the world, and an idiosyncratic, privately observed preference shock. Under weak conditions, as the number of individuals increases, the...
Persistent link: https://www.econbiz.de/10005596813
Persistent link: https://www.econbiz.de/10005827954
In laboratory experiments, information cascades are ephemeral phenomena, collapsing soon after they form, and them reforming again. The formation/collapse/reformation cycles occur frequently and repeatedly. Cascades may be reversed (collapse followed by a cascade on a different state) and more...
Persistent link: https://www.econbiz.de/10005292979
We consider the spread of a harmful state through a population divided into two groups. Interaction patterns capture the full spectrum of assortativity possibilities. We show that a central planner who aims for eradication optimally either divides equally the resources across groups, or...
Persistent link: https://www.econbiz.de/10010568483
Persistent link: https://www.econbiz.de/10001787056
We survey and synthesize models of network formation based on random graphs and stochastic processes. We organize the material according to whether the population is treated as fixed or dynamic. We pay particular attention to the effects of homophilous linking on network structure. Finally, we...
Persistent link: https://www.econbiz.de/10013022239