Artificial Economics

Valladolid (Spain), September 10-11, 2009































                                                                                              Invited Speakers


Prof. Dr. Carles Sierra


Professor, Institute of Research on Artificial Intelligence of the Spanish Council for Scientific Research.

 Title of the talk: Agents, Information and Negotiation

Abstract: Successful negotiators prepare by determining their position along five dimensions: Legitimacy, Options, Goals, Independence, and Commitment, (LOGIC). We introduce a negotiation model based on these dimensions and on two primitive concepts: intimacy (degree of closeness) and balance (degree of fairness). The intimacy is a pair of matrices that evaluate both an agent's contribution to the relationship and its opponent's contribution each from an information view and from a utilitarian view across the five LOGIC dimensions. The balance is the difference between these matrices. A relationship strategy maintains a target intimacy for each relationship that an agent would like the relationship to move towards in future. The negotiation strategy maintains a set of Options that are in-line with the current intimacy level, and then tactics wrap the Options in argumentation with the aim of attaining a successful deal and manipulating the successive negotiation balances towards the target intimacy. Summary measures if trust and reputation are also discussed.

CV summary

Carles Sierra Received the M.Sc. in Computer Science (1986) and the PhD in Computer Science (1989) from the Technical University of Catalonia (UPC), Barcelona, Spain. He is Full Professor of the Spanish National Research Council. His current research interests include: Formal methods, multiagent systems, uncertainty, and robotics. He has participated in more than twenty research projects funded by the European Commission and the Spanish Government, and has published more than two hundred papers in specialised conferences and scientific journals. Recently, he have been particularly active in the area of electronic institutions. Carles Sierra has published several papers on modelling electronic auctions, and on automatic negotiation models among autonomous agents. He has actively served the community of agents as general chair of ‘Autonomous Agents 2000’, co-ordinator of the European Special Interest Group on Agent-mediated Electronic Commerce, and as PC chair of AAMAS 2004. He is an ECCAI Fellow, and a member of the IFAAMAS (International Foundation of Autonomous Agents and Multiagent Systems) and EUMAS (European Conference on Multiagent Systems) boards. Carles Sierra will be the local organiser of the IJCAI-11 conference that will take place in Barcelona. He has received several best paper awards in the area of agents and artificial intelligence and he is member of four editorial boards of journals in the area of multiagent systems, including the prestigious Journal of Autonomous Agents and Multiagent Systems.


Prof. Dr.    Sorin Solomon



Professor, Racah Institute of Physics at the Hebrew University of Jerusalem.

Title of the talk: How do Micro-Economic Simple Rules Generate Complex Macro-Economic Behavior? An Agent Based Modelling Approach for Connecting Empirical Facts with Theoretical Predictions

Abstract: For a very long while it was customary in economics and in science in general to formalize mathematically a collection of many similar objects in terms of "representative agents" or "mean field" continuous functions in space and time representing the local average of their individual properties. In fact, this "mean field" / continuum / linear way of thinking is what kept the various scientific domain apart. Indeed, the great conceptual jumps separating the various fields and the accompanying paradoxes connected to the nature of life, intelligence, trade, credit, growth, market, society, culture, arise exactly from the failure of the "mean field" and "average" assumptions. When "More Is Different" (the title of the article published 35 years ago by Nobel Laureate Phil Anderson) the singular, extreme, very rare events become crucial and life emerges from chemistry, conscience from life, social institutions /firms/markets from conscient interacting individuals, economies from firms etc One can think about the "elementary" objects belonging to the "simpler" level (say firms in microeconomics) as the nodes of a network and about the "elementary" interactions between them as the links of the network. The dynamics of the entire system (say macroeconomics) is then emerging from the interactions of the individual links and nodes. The global features of the resulting network correspond to the collective properties of the emerging system: (quasi-)disconnected network components correspond to (almost-)independent emergent economic branches; scaling properties of the network correspond to power laws in the firms distribution, long-lived (meta-stable) network features correspond to critical slowing down activity. The knowledge of the collective emerging features of the network allows one to devise methods to expedite by orders of magnitude desired processes (or to delay or stop un-wanted ones). I will describe the application of this approach to a few specific economic systems and confront the results to empirical data.


CV summary

Professor, Racah Institute of Physics at the Hebrew University of Jerusalem. Head of the Multi-Agent Systems Unit at the Institute for Scientific Interchange Torino. Chair of the EU Commission Expert Group on Applications of Complexity in Science. Chair the first and the 5th European Conferences of Complexity Science. Scientific Coordinator of "General Integration of the Applications of Complexity in Science" (*GIACS*); "Common Complex Collective Phenomena in Statistical Mechanics, Society, Economics, and Biology" (CO3); "Dynamic Analysis of Physiological Networks" (*DAPHNet*). Awards: Levinson , St Francis Xavier , Bantrell (Caltech), J.F. Kennedy, Weizmann, Keren Kayemet. Books: "Microscopic Simulation of Financial Markets, From Investor Behavior to Market Phenomena" Academic Press, NY 2000; "Anatomy of Successful Products", Edison: TA 1999, "Cracking the Ad Code"– Cambridge U P, 2009. Committees: Center for Complexity Science, ComPlexUs, Int. J. Mod. Phys.C, J. Stat. Mech., "New Economic Windows" Series, Springer- Verlag.