The book provides the first comprehensive, and accessible account of complex adaptive social systems, by two of the field's leading authorities. Such systems - whether political partiers, stock markets, or ant colonies - present some of the most intrifuing theoretical and practical challenges...

We study some recent developments and challenges in the empirics of the effects of social networks. We focus in particular on researchers' ability to make policy recommendations based on a standard linear econometric model. We examine the potential compatibility between this type of econometric...

Social network sites have rapidly become very popular, but the business models behind them are still in their infancy. In this paper, a new combination of value modeling techniques is proposed to explore business models for the new web. In this approach, the business models are built up as...

We study some recent developments and challenges in the empirics of the effects of social networks. We focus in particular on researchers' ability to make policy recommendations based on a standard linear econometric model. We examine the potential compatibility between this type of econometric...

We consider a social network from which one observes not only network structure (i.e., nodes and edges) but also a set of labels (or tags, keywords) for each node (or user). These labels are self-created and closely related to the user's career status, life style, personal interests, and many...