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- Frank Schweitzer:
-
Coordination of Decisions in a Spatial
Model of Brownian
Agents
- in:
-
Economics with
Heterogeneous Interacting Agents
(WEHIA)
(Ed. M. Gallegati)
Berlin: Springer 2002, in press
- Abstract:
-
Brownian agents denote a particular class of heterogeneous agents that
combines features of reactive and reflexive agent concepts. As one
major advance, the Brownian agent concept allows the derivation of
macroscopic equations from the agent dynamics, which can be used to
analyze and predict the behavior of the MAS. As an application of the
concept, we discuss a binary choice problem where individual
decisions are based on different local information generated by the
agents. The spatial coordination of decisions in a multi-agent
community is investigated both analytically and by means of stochastic
computer simulations. We find that dependent on two essential
parameters describing the local impact and the spatial dissemination of
information either a definite stable minority/majority relation
(single-attractor regime) or a broad range of possible values
(multi-attractor regime) occurs. In the latter case, the outcome of the
decision process becomes rather diverse and hard to predict, both with
respect to the fraction of the majority and their spatial distribution.
We also show that a more ``efficient'' information dissemination of
a subpopulation provides a suitable way to stabilize their majority
status and to reduce ``diversity'' and
uncertainty in the decision process.
- Keywords:
-
spatial structures, collective phenomena,
communication, decision processes, multi-agent system, phase separation
web-wehia.pdf (PDF File: 287 kB)
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