FORUM Complexity in Urban Development and Management Historical Overview and Opportunities Timothy M. Baynes Keywords: agent-based modeling cellular automata cities decision making industrial ecology network Summary Systems dynamics, cellular automata, agent-based modeling, and network analyses have been used in population, land use, and transport planning models. An overview of complex sys- tems science as applied to urban development is presented, and examples are given of where the problems of housing people and anticipating their movements have been addressed with complex approaches, sometimes in concert with deter- ministic, large-scale urban models. Planning for cities today has additional environmental and social priorities in common with many topics that concern industrial ecology. The research agenda suggested here is that this, too, can be enriched with complex systems thinking and models to complement the often static assessment of environmental performance and better inform decision processes. Address correspondence to: Timothy M. Baynes Commonwealth Scientific and Industrial Research Organisation Sustainable Ecosystems Division Urban Systems Program P.O. Box 310 North Ryde NSW 1670 Australia tim.baynes@csiro.au www.csiro.au/people/Tim.Baynes/html c  2009 by Yale University DOI: 10.1111/j.1530-9290.2009.00123.x Volume 13, Number 2 214 Journal of Industrial Ecology www.blackwellpublishing.com/jie