Chaos theory has touched on such fields as biology, cognitive science, and physics. By providing a unified and complete explanation of new statistical methods that are useful for testing for chaos in data sets, Brock, Hsieh, and LeBaron show how the principles of chaos theory can be applied to...

Economists have traditionally studied aggregate behavior as the outcome of individual decisions made interactively, while sociologists have focused on the role of social influences on individual behavior. Over the past decade, however, the barriers between the disciplines have broken down,...