@



On many occasions, individual agents have to coordinate their economic activities. Without any actor achieving a complete understanding of the whole system, the adaptive behavior of a large ensemble of agents serving their individual economic goals often combines to a highly coordinated macroscopic outcome. On the other hand, many situations occur in which economic activities are poorly coordinated, and markets fail to achieve efficient global outcomes.

The success or failure of individuals in coordinating their actions is still only partially understood. There is, however, an increasing awareness of researchers in many fields that economic and social systems consist of a large collection of interacting economic agents. These interactions among economic agents merit careful study in order to understand the macroscopic behavior of decentralized economic systems. Agent-based modeling pays particular attention to the relationship between local interactions and macroscopic properties. While the behavior of economic actors (households, firms) has always been the natural focus of research in economics, analysis of heterogeneity and interaction of agents had been eschewed to a large extent due to the dominance of the paradigm of the representative agent. However, interaction is a pervasive and undeniable characteristic of real-world economics. Straightforward examples include dispersion of information or neighborhood effects which have focused so prominently in the development of many interaction-based models. Much of what would be the focus of publications in the new journal might be summarized by the dichotomy in the programmatic title of Schellingfs seminal 1978 book: eMicromotives and Macrobehaviorf (Thomas Schelling, New York: Norton). Ongoing theoretical research into the dynamics of complex economic networks may provide further clues as to how coordination normally works in decentralized economic systems, and why it occasionally fails.

 The Journal of Economic Interaction and Coordination (JEIC) aims to provide a new venue for high-quality multi-disciplinary research addressing theoretical and computational aspects of interaction and coordination of economic agents. Contributions will not be restricted to any particular school of thought, but need to be based on rigorous theoretical or computational models or up-to-date econometric methodology. JEIC will be focusing on both the study of emergent behavior in economic activities as well as on the development of analytical and computational tools in models with interacting economic agents.

JEIC serves for sharing the most recent theoretical developments and methodological advances, and it aims to promote interactions and cross-fertilization among different approaches. JEIC especially encourages submission of papers at the cutting-edge of other approaches that are relevant to economic and social systems. This genuinely interdisciplinary approach will enable researchers and students to expand their knowledge and to draw upon a variety of concepts for future interdisciplinary collaborations.

JEIC encourages submissions in all of the below categories:

 (1) Theoretical contributions to the analysis of the role of interactions in economic systems;

 (2) Computation: development of methodology and computational techniques for models with distributed evolving agents in complex economic and social settings;

 (3) Laboratory experiments with human subjects to test extent theories of collective behaviors of interacting agents;

 (4) Empirical validation of hypotheses derived from agent-based models;

 (5) System and policy design: policy relevant implications derived from agent-based models.

JEIC is the official journal of ESHIA. the Society for Economic Science with Heterogeneous Interacting Agents (ESHIA) which has been launched in 2006. Accommodating a vibrant interdisciplinary area, the society aims to bring together researchers focusing on agent-based approaches in economics and neighboring fields. For more information please visit www.es-hia.org.

Having grown out of the highly successful annual Workshops on Economics with Heterogeneous Interacting Agents (WEHIA), the new journal is itself a product of the self-organization of an emerging interdisciplinary community which has experienced almost exponential growth of its membership since the inception of the WEHIA tradition in the historical Ancona meeting of 1995. The editorial board is backed by prominent researchers representing all currents within the WEHIA/ESHIA community. For the journal to become a success, we count on the community from which strong papers need to be submitted to the new platform in order to attract readers and ensure that it will make an impact on the development of agent-based economic research.

Founding Editors
Akira Namatame
Thomas Lux
Robert Axtell