This volume is an important complement to Wasserman and Faust's Social Network Analysis: Methods and Applications (Cambridge, 1995). The authors, leading methodologists, present the most significant developments in quantitative models and methods for analyzing social network data that appeared in the 1990s. They review recent advances in network measurement, network sampling, analysis of centrality, positional analysis or blockmodelling, analysis of diffusion through networks, analysis of affiliation or "two-mode" networks, the theory of random graphs, and dependence graphs.