NIgel Gilbert is a sociologist at the University of Surrey, United Kingdom. His main research interests are processual theories of social phenomena, the development of computational sociology and the methodology of computer simulation, especially agent-based modelling. He is Director of the Centre for Research in Social Simulation.He is currently Director of the Centre for the Evaluation of Complexity Across the Nexus (CECAN), and the Principal Investigator of the projects ANTICIPATE (about identifying the unanticipated impacts of public policy), and LIPSIT (Local Institutions, Productivity, Sustainability and Inclusivity Trade-offs) about identifying institutional and organisational arrangements at the regional level that tend to lead to the ‘good’ management of policy trade-offs associated with increasing productivity.He is also Director of the University's Institute of Advanced Studies and responsible for its development as a centre for intellectual interchange.He is the a