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34                                            P. Davidsson and H. Verhagen

            Focus            Aspect             Options
            Usage            Users              Scientists
                                                Policy-makers
                                                Managers
                                                Non-professionals
                             Purposes           Management of a system
                                                Design or engineering of a system
                                                Evaluation and verification
                                                Understanding
                                                Education
                                                Training
                                                Entertainment
            System simulated  Human-centred systems  Human societies
                                                Organizations
                                                Economic systems
                             Natural systems    Animal societies
                                                Ecological systems
                             Socio-technical systems
                             Artificial systems
            Individual model  Individual physical state  Feature vector
                             Individual mental state  Feature vector
                                                BDI
                             Individual behaviour  Transition probabilities
                                                Decision rules
                                                Cognitive model (soar, ACT-R, etc.)
                             Basis of behaviour  Own state
                                                State of the environment
                                                State of other individuals
                                                Social states
                             Uniformity         Uniform/non-uniform
                             Population         Static/dynamic
            Interaction model  Form of interaction  No interaction
                                                Physical
                                                Language-based
                             Interaction topology  Static/dynamic
                                                Neighbourhood/network
            Environment model  Spatial explicitness  None
                                                Relative positions
                                                Absolute positions
                             Time               Static/dynamic
                             Exogenous events   Yes/no
            Implementation   Simulation engine  Time-driven/event-driven
                             Programming        MABS platform (NetLogo, Repast, etc.)
                                                MAS platform (JADE, etc.)
                                                From scratch (C, Java, etc.)
                             Distributedness    Single computer/distributed
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