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\title{Preface}
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\noindent
Algorithmic Decision Theory is a new interdisciplinary research area that aims to
put together researchers coming from different fields such as Decision Theory,
Discrete Mathematics, Theoretical Computer Science and Artificial Intelligence,
in order to improve decision support in the presence of massive data bases,
combinatorial structures, partial and/or uncertain information and distributed,
possibly interoperating decision makers. Such problems arise in several real-world
decision making scenarios such as humanitarian logistics, epidemiology, risk assessment
and management, e-government, electronic commerce, and recommender
systems.

In 2007, the EU-funded COST Action IC0602 on Algorithmic Decision
Theory was started, networking a number of researchers and research
laboratories around Europe (and beyond). The COST Action IC0602
gathers today more than 100 participants from more than 30 countries
(including non-COST countries such as Australia, South Africa and
the USA). For more details see \underline{www.algodec.org}. Within
the Action, and in cooperation with the EURO Working Group on
Preferences, it was decided to start a new series of conferences on
Algorithmic Decision Theory, the goal being to provide a forum for
researchers interested in this area.

This volume contains the papers presented at ADT 2009, the first
International Conference on Algorithmic Decision Theory. The
conference was held in San Servolo, a small island of the Venice
lagoon, on October 20-23, 2009. The program of the conference
included oral presentations, posters, invited talks, and tutorials
(for more information see \underline{www.adt2009.org}).

The conference received 65 submissions. Each submission was reviewed
by at least 2 programme committee members, and the program committee
decided to accept 39 papers (of which 9 posters). The topics of
these papers range from computational social choice to preference
modeling, from uncertainty to preference learning, from
multi-criteria decision making to game theory. We believe that many
colleagues will find this collection of papers exciting and useful
for the advancement of the state of the art in their respective
disciplines.

We would like to take this opportunity to thank all authors who
submitted papers to this conference, as well as all the program
committee members and external reviewers for their useful work. ADT
2009 was made possible thanks to the support of the COST Action
IC0602 on Algorithmic Decision Theory, the Association for
Constraint Programming, the EURO (Association of European
Operational Research Societies), the LAMSADE at University of Paris
Dauphine, the Department of Pure and Applied Mathematics of the
University of Padova, DIMACS, Rutgers University, USA and the CNRS
(Centre National de la Recherche Scientifique, France).

We would also like to thank the support of Easychair for the creation of this volume.

\par~\par

\noindent
October 2009 \hfill Francesca Rossi\\
\mbox{} \hfill Alexis Tsouki\`as

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\title{Conference Organisation}
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\section*{Programme Chairs}
\noindent Alexis Tsouki\`as

\section*{Programme Committee}
\noindent
Ronen Brafman\\
Vince Conitzer\\
Jim Delgrande\\
Jon Doyle\\
Ulle Endriss\\
Jose Figueira\\
Judy Goldsmith\\
Salvatore Greco\\
Ulrich Junker\\
Werner Kiessling\\
Jerome Lang\\
Nicolas Maudet\\
Barry O'Sullivan\\
Sasa Pekec\\
Patrice Perny\\
Eleni Pratisini\\
Pearl Pu\\
David Rios Insua\\
Fred Roberts\\
Francesca Rossi\\
Ahti Salo\\
Roman S\l owi\'nski\\
Mike Trick\\
Esko Turunen\\
Toby Walsh

\section*{Local Organisation}

\noindent
Francesca Rossi (chair)\\
Mirco Gelain (publicity and web site)\\
Kristen Brent Venable\\

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\section*{External Reviewers}
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\noindent
Stephane Airiau \\
Gianluca Antonini \\
Denis Bouyssou \\
Sylvain Castagnos \\
Yann Chevaleyre\\
Eric Cope \\
Boi Faltings \\
Umberto Grandi \\
David Krieg \\
Michel Minoux \\
Maria Silvia Pini \\
Daniele Porello \\
Gautier Stauffer \\
Paul Weng

%\textbf{WARNING:} There is no guarantee that the
%reviewers in this list are put in the right order. Please check
%the list manually and change the order, if necessary.

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\section*{Sponsors}

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\title{Table of Contents}
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% Paper in the list below have been ordered by EasyChair
% using the following the order specified by Alexis: divided by
% authors as they are presented with posters at the end of each subject.
\tocSection{Social Choice Theory}{}
  \tocTitle{A complete conclusion-based procedure for judgment aggregation}{1}
    \tocAuthors{Gabriella Pigozzi, Marija Slavkovik, Leon van der Torre}
  \tocTitle{A geometric approach to paradoxes of majority voting in abstract aggregation theory}{13}
    \tocAuthors{Daniel Eckert, Christian Klamler}
  \tocTitle{Manipulating Tournaments in Cup and Round Robin Competitions}{25}
    \tocAuthors{Tyrel Russell, Toby Walsh}
  \tocTitle{Iterated majority voting}{37}
    \tocAuthors{Stephane Airiau, Ulle Endriss}
  \tocTitle{Committee Selection with a Weight Constraint Based on Lexicographic Rankings of Individuals}{49}
    \tocAuthors{Christian Klamler, Ulrich Pferschy, Stefan Ruzika}
  \tocTitle{The Effects of Noise and Manipulation on the Accuracy of Collective Decision Rules}{61}
    \tocAuthors{Peter Bodo}
  \tocTitle{Subset Weight Maximization with Two Competing Agents}{73}
    \tocAuthors{Gaia Nicosia, Andrea Pacifici, Ulrich Pferschy}
  \tocTitle{The Complexity of Probabilistic Lobbying}{85}
    \tocAuthors{Gabor Erdelyi, Henning Fernau, Judy Goldsmith, Nicholas Mattei, Daniel Raible, J\"org Rothe}
  \tocTitle{On the complexity of efficiency and envy-freeness in fair division of indivisible goods with additive preferences}{97}
    \tocAuthors{Bart de Keijzer, Sylvain Bouveret, Tomas Klos, Yingqian Zhang}
  \tocTitle{On low-envy truthful allocations}{109}
    \tocAuthors{Ioannis Caragiannis, Christos Kaklamanis, Panagiotis Kanellopoulos, Maria Kyropoulou}
  \tocTitle{On Multi-Dimensional Envy-Free Mechanisms}{118}
    \tocAuthors{Ahuva Mu'alem}
  \tocTitle{Stable rankings in collective decision making with imprecise information}{130}
    \tocAuthors{Miguel A. Hinojosa, Ignacio Contreras, Amparo M\'armol}
  \tocTitle{Finding the $k$ Best Policies}{142}
    \tocAuthors{Peng Dai, Judy Goldsmith}
\tocSection{Multiple Criteria Decision Analysis}{}
  \tocTitle{New Hybrid Recommender Approaches: An Application to Equity Funds Selection}{154}
    \tocAuthors{Nikolaos Matsatsinis, Lefteris Manarolis}
  \tocTitle{A Prescriptive Approach for Eliciting Imprecise Weight Statements in an MCDA Process}{166}
    \tocAuthors{Mona Riabacke, Mats Danielson, Love Ekenberg, Aron Larsson}
  \tocTitle{Inverse analysis from a Condorcet robustness denotation of valued outranking relations}{178}
    \tocAuthors{Raymond Bisdorff, Patrick Meyer, Thomas Veneziano}
  \tocTitle{Directional Decomposition of Multiattribute Utility Functions}{190}
    \tocAuthors{Ronen Brafman, Yagil Engel}
  \tocTitle{The possible and the necessary for multiple criteria group decision}{201}
    \tocAuthors{Salvatore Greco, Vincent Mousseau, Roman S\l owi\'nski}
  \tocTitle{Preferences in an Open World}{213}
    \tocAuthors{Ulrich Junker}
  \tocTitle{Extending Argumentation to make Good Decisions}{223}
    \tocAuthors{Yannis Dimopoulos, Pavlos Moraitis, Leila Amgoud}
  \tocTitle{Building consistent pairwise comparison matrices over abelian linearly ordered groups.}{235}
    \tocAuthors{Bice Cavallo, Livia D'Apuzzo, Massimo Squillante}
  \tocTitle{Aggregating interval orders by propositional optimization}{247}
    \tocAuthors{Daniel le Berre, Pierre Marquis, Meltem \"Ozt\"urk}
  \tocTitle{Circular representations of a valued preference matrix}{259}
    \tocAuthors{Karim Lidouh, Yves De Smet, Minh Tuan Huynh}
\tocSection{Decision under Uncertainty}{}
  \tocTitle{The first belief dominance: a new approach in evidence theory for comparing basic belief assignments}{270}
    \tocAuthors{Mohamed Ayman Boujelben, Yves De Smet, Ahmed Frikha, Habib Chabchoub}
  \tocTitle{Interpreting GUHA Data Mining Logic in Para Consistent Fuzzy Logic Framework}{282}
    \tocAuthors{Esko Turunen}
  \tocTitle{Insuring Risk-Averse Agents}{294}
    \tocAuthors{Greg Hines, Kate Larson}
  \tocTitle{Adversarial Risk Analysis: applications to basic models in counterterrorism}{306}
    \tocAuthors{Jesus Rios, David Rios Insua}
  \tocTitle{Game Theory without Decision-Theoretic Paradoxes}{316}
    \tocAuthors{Pierfrancesco La Mura}
  \tocTitle{Ranking Methods Based on Dominance Measures Accounting for Imprecision}{328}
    \tocAuthors{Alfonso Mateos, Antonio Jim\'enez, Jos\'e F. Blanco}
\tocSection{Optimisation}{}
  \tocTitle{Optimizing the Hurwicz criterion in decision trees with imprecise probabilities}{340}
    \tocAuthors{Gildas Jeantet, Olivier Spanjaard}
  \tocTitle{Axioms for a Class of Algorithms of Sequential Decision Making}{352}
    \tocAuthors{Murali Agastya, Arkadii Slinko}
  \tocTitle{Algorithmic aspects of multi-stage decision process optimization}{364}
    \tocAuthors{Ronald Hochreiter}
  \tocTitle{Choquet Optimization using GAI Networks for Multiagent/Multicriteria Decision-Making}{376}
    \tocAuthors{Jean-Philippe Dubus, Christophe Gonzales, Patrice Perny}
  \tocTitle{Compact preference representation in stable marriage problems}{388}
    \tocAuthors{Enrico Pilotto, Francesca Rossi, Kristen Brent Venable, Toby Walsh}
  \tocTitle{Neuroevolutionary Inventory Control in Multi-Echelon Systems}{400}
    \tocAuthors{Steve Prestwich, Armagan Tarim, Roberto Rossi, Brahim Hnich}
  \tocTitle{Determining a Minimum Spanning Tree with Disjunctive Constraints}{412}
    \tocAuthors{Andreas Darmann, Ulrich Pferschy, Joachim Schauer}
\tocSection{Learning}{}
  \tocTitle{An inductive methodology for data-based rules building}{423}
    \tocAuthors{J. Tinguaro Rodr\'{\i}guez, Javier Montero, Bego\~na Vitoriano, Victoria L\'opez}
  \tocTitle{A framework for designing a fuzzy rule-based classifier}{433}
    \tocAuthors{Jonas Guzaitis, Antanas Verikas, Adas Gelzinis, Marija Bacauskiene}
  \tocTitle{Anytime Self-play Learning to Satisfy Functional Optimality Criteria}{445}
    \tocAuthors{Andriy Burkov, Brahim Chaib-draa}

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