His current research focuses on the dynamic analysis of social networks using cellular telephone call log data, with a specific focus on disentangling tie strength, reciprocity, degree assortativity, and embeddedness using weighted-edge graphs. Working with computer scientists and engineers, Dr. Hachen is designing and studying virtual organizations for crowdsourcing as part of the Open Sourcing the Design of Civil Infrastructure(OSD-CI) project. Dr. Hachen is also beginning a study of social networks and the diffusion of tastes among college students. Dr. Hachen is the author of an innovate introduction to sociology textbook, Sociology in Action: Cases for Critical and Sociological Thinking (Sage, 2001) which uses decision cases to activate student learning.