This Ph.D. level seminar will explore and critically examine principles methodologies, and analytical approaches for research involving complex social/organizational systems and dynamics that span multiple levels of analysis (e.g., time, individual, dyad, team, organization, society). Topics of discussion include historical foundations of research on social/organizational systems, methodologies and analytical tools for studying multilevel systems, and emerging techniques for representing dynamic phenomena in complex social/organizational systems. The goal of this course is to equip studetns with the requisite knowledge and skills for studying how human behavior, cognition, affect, and social interaction shape and are shaped over time in response to other actors and the environment, as well as how psychological, social, and organizational outcomes merge from these processes.