network effects have the feature that the adoption of others in the reference group - the Òinstalled-baseÓ - has a causal … homophily) and from the existence of unobservables across agents that are correlated. In the absence of experimental variation …

opposite. We find that the density of network connections determines the impact of preference diversity and homophily on … similar preferences---a phenomenon known as homophily. Using this model, we resolve a puzzle in the literature: theoretical … models predict that preference diversity helps learning, and homophily slows learning, while empirical work suggests the …

We present a model of bandwidth allocation in a stylized peer-to-peer file sharing network. Given an arbitrary … and that the di®erence decreases as the size of the network grows. This paper constitutes a first step towards providing a …

This paper studies a spatial model of electronic business network formation where firms build links based on a cost … "key-player" (e.g. a firm providing an exchange platform in a business-to-business network) provides a higher level of … values of link formation, stable and efficient network structures comprise only a subset of the total set of firms, excluding …

to network formation in order to develop such a model. Agents spend costly resources to socialize. Their effort levels …

or noise in signals about values, opportunities to innovate in smaller or less connected (in the network-theoretic sense …

by a network of unpaid software developers. Using data from Sourceforge.net, the largest repository of Open Source … Software (OSS) projects and contributors on the Internet, we construct two related networks: A Project network and a … Contributor network. Knowledge spillovers may be closely related to the structure of such networks, since contributors who work on …

social network; identifying influential players that facilitate information dissemination emerges as a pivotal step for their … success. In this paper, we tackle this problem using a stylized model that features payoff externalities and local network … effects, and the network designer is allowed to release information to only a subset of players (leaders); these targeted …