conference, Valladolid, September

From: derek gatherer (
Date: Mon 02 Feb 2004 - 19:54:01 GMT

  • Next message: Steven Thiele: "Re: what is a meme?"

    M2M2 Second "Model to Model" workshop: Comparing and combining agent-based models with each other, and with other models Workshop to be held on 14 and 15 September 2004, Valladolid, Spain In association with the second ESSA conference

    Aims and Topic

    In recent years there has been an explosion of published literature utilising Multi- Agent-Based Simulation (MABS) to study social, biological and artificial systems. However, despite the plethora of novel models and interesting results it is rare that models are compared, built-on or transferred between researchers. It would seem there is a dearth of "model-to-model" analysis. The second M2M workshop, M2M2, is aimed at gathering researchers in MABS who are interested in understanding and furthering the transferability of knowledge between Multi-Agent Based Simulation models and beyond. As in the first M2M workshop (Marseille, France, March-April 2003), papers are invited reporting comparisons and validations involving two or more models, at least one being an agent-based model. Understanding complex systems often seems to necessitate the use of more than one model. By specifically comparing models a better view of what modelling brings to the understanding of (real and artificial) societies may be facilitated. The union of two or more models with apparently incompatible levels of abstraction, comparisons of results from related studies, and the description of model findings in ways allowing others to check and replicate them, all require the development of methods that improve rigor and reproducibility. Approaches of interest include but are not limited to:

    * Rewriting models that others have described in papers so as to understand them more deeply and reproduce the stated results;
    * Composition of models where different scales are inter-related in a larger model - the results of one model being used in the other;
    * Aligning of models: a comparison of different models that announce the same type of results, so as to evaluate their actual similarities;
    * Comparison of different models based on their fitness to a set of data, accumulated through field studies or experiments;
    * Using one model as a post-hoc summary or abstraction of another model's results; Constraining the scope of an existing model to enable more powerful techniques to be applied in a different computational framework;
    * Using models with different structures and assumptions to confirm each other's results;
    * Determining what to do when two models give results that contradict each other.
    * Constructing and using taxonomies or description schemas for use in comparing or combining MABS models.

    At the first M2M workshop, two specific issues were addressed:
    (1) How can different multi-agent models best be compared? (What kinds of comparison are feasible, and how can comparisons be useful?)
    (2) Is it possible to transmit the structure of a model and its results among researchers through papers, or should we look for other means of transmission?

    The meeting proved that the issues at stake seemed fundamental for many practitioners. Most papers addressed the replication of models through alignment: comparing different level of aggregation describing the same system and evaluating the differences and similarities between centralised models and distributed ones; checking the influence of rationality at different result levels, or trying to integrate several forms of rationality. Other papers addressed the issue of replication and concluded here that there are considerable conceptual and practical difficulties in replicating others' work, but doing so can be most enlightening.

    A number of papers have been published in a resulting special issue in JASSS ( Authors wishing to submit a paper to M2M2 are advised to refer to this issue, although it is not representative of all possible approaches on the topic. Following M2M, this new workshop will hopefully bring together an international community and produce new frameworks to look at agent-based simulation results.

    Date and Venue

    The M2M2 workshop will be held in association with the 2004 ESSA conference, as a 1 1/2 day workshop on the 14th and 15th of September 2004 in Valladolid, Spain. The same format will be kept for presentation, 45 minutes being given to each participant to present their paper.

    Call for Papers

    Send paper by email by April 15, to: Nick Gotts ( or Guillaume Deffuant ( Papers should be sized between 10 and 20 pages and will be selected through peer review. Contributors wishing to submit demos, models, or other material with their paper are invited to contact a member of the organising committee.

    Organising committee

    Claudio Cioffi-Revilla Guillaume Deffuant Nick Gotts Juliette Rouchier

    Local organisation

    Cesareo Hernandez Iglesias

    Program committee (to be confirmed) Rob Axtell, Francois Bousquet, Paul Davidsson, Marco Janssen, Christophe Le Page, Scott Moss, Mario Paolucci, Javier Pajares, Adolfo Lopez, David Hales, Bruce Edmonds, Frederic Amblard, Bill McKelvey, Luis Antunes, Olivier Barreteau, Matt Hare, Thierry Faure, Thomas Brenner, Wander Jager, Catholijn Jonker.

    ________________________________________________________________________ BT Yahoo! Broadband - Free modem offer, sign up online today and save 80

    =============================================================== This was distributed via the memetics list associated with the Journal of Memetics - Evolutionary Models of Information Transmission For information about the journal and the list (e.g. unsubscribing) see:

    This archive was generated by hypermail 2.1.5 : Mon 02 Feb 2004 - 20:06:21 GMT