The Complexity of Economic Space. Two notions should be distinguished: complication and complexity. The first, is conceived as the quantitative escalation of what is theoretically reducible, e.g. one directional hierarchical structure and circular action. The second, are systems formed by great number of elements combined in a nonlinear way in interactions with many other elements. Then, such systems cannot by reduced to simple elements, like atoms in chemical matter. Examples are: human individuals, brains, ecosystems, economy, cities and regions. Complex systems are characterized a.o. by the following features: intensive interactions, feedbacks, nonlinearities, fluctuation, self-reinforcing, accumulation, emergence, alternate hierarchical systems, path dependence, coevolution. Some of them are presented in this paper.
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