Networks, Topology and Dynamics Theory and Applications to Economics

The volume, devoted to recent contributions to the field of networks modelling, offers a wide panorama of recent advances, both theoretical and methodological, that will interest academics as well as practitioners. Theory and applications are nicely integ

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Ahmad K. Naimzada . Silvana Stefani . Anna Torriero (Eds.)

Networks, Topology and Dynamics Theory and Applications to Economics and Social Systems

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Prof. Ahmad K. Naimzada Università degli Studi di Milano-Bicocca Dipto. Economia Politica Piazza dell' Ateneo Nuovo, 1 20126 Milano Italy [email protected]

Prof. Anna Torriero Università Cattolica del Sarcro Cuore Largo A. Gemelli, 1 20123 Milano Italy [email protected]

Prof. Silvana Stefani Università degli Studi di Milano-Bicocca Dipto. Economia Politica Piazza dell' Ateneo Nuovo, 1 20126 Milano Italy [email protected]

ISBN 978-3-540-68407-7

e-ISBN 978-3-540-68409-1

DOI 10.1007/978-3-540-68409-1 Lecture Notes in Economics and Mathematical Systems ISSN 0075-8442 Library of Congress Control Number: 2008928718 The volume has been published with the financial contribution of the Quantitative Methods Department of the University of Milano-Bicocca, Italy. © 2009 Springer-Verlag Berlin Heidelberg This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permissions for use must always be obtained from Springer-Verlag. Violations are liable for prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: WMXDesign GmbH, Heidelberg Printed on acid-free paper 9 8 7 6 5 4 3 2 1 springer.com

Preface

There is convergent consensus among scientists that many social, economic and financial phenomena can be described by a network of agents and their interactions. Surprisingly, even though the application fields are quite different, those networks often show a common behaviour. Thus, their topological properties can give useful insights on how the network is structured, which are the most “important” nodes/agents, how the network reacts to new arrivals. Moreover the network, once included into a dynamic context, helps to model many phenomena. Among the topics in which topology and dynamics are the essential tools, we will focus on the diffusion of technologies and fads, the rise of industrial districts, the evolution of financial markets, cooperation and competition, information flows, centrality and prestige. The volume, including recent contributions to the field of network modelling, is based on the communications presented at NET 2006 (Verbania, Italy) and NET 2007 (Urbino, Italy); offers a wide range of recent advances, both theoretical and methodological, that will interest academics as well