Electronic Government 6th International Conference, EGOV 2007, Regen

EGOV 2007 was the sixth edition of this highly successful series of annual int- national conferences dedicated to electronic government research and practice. Like all its predecessors, EGOV 2007 achieved a remarkable number of paper submissions. Moreover

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Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen University of Dortmund, Germany Madhu Sudan Massachusetts Institute of Technology, MA, USA Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA Moshe Y. Vardi Rice University, Houston, TX, USA Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany

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Maria A. Wimmer Jochen Scholl Åke Grönlund (Eds.)

Electronic Government 6th International Conference, EGOV 2007 Regensburg, Germany, September 3-7, 2007 Proceedings

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Volume Editors Maria A. Wimmer University of Koblenz-Landau 56070 Koblenz, Germany E-mail: [email protected] Jochen Scholl University of Washington Mary Gates Hall, Suite 370C 98195-2840 Seattle, USA E-mail: [email protected] Åke Grönlund Örebro University ESI/Informatics 70182 Örebro, Sweden E-mail: [email protected]

Library of Congress Control Number: 2007933375 CR Subject Classification (1998): K.4, K.6.5, K.5, K.3, C.2, H.5, H.4 LNCS Sublibrary: SL 3 – Information Systems and Application, incl. Internet/Web and HCI ISSN ISBN-10 ISBN-13

0302-9743 3-540-74443-6 Springer Berlin Heidelberg New York 978-3-540-74443-6 Springer Berlin Heidelberg New York

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Preface

EGOV 2007 was the sixth edition of this highly successful series of annual international conferences dedicated to electronic government research and practice. Like all its predecessors, EGOV 2007 achieved a remarkable number of paper submissions. Moreover, the quality of this year’s submissions again superseded previous years’ submissions. For the third year in a row, the conference was anteceded by a doctoral colloquium, with approximately 20 PhD projects discussed. The conference also p